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Flowmaster American Thunder Header Back Exhaust System 17104

Flowmaster American Thunder Header Back Exhaust System 17104
Flowmaster American Thunder Header Back Exhaust System 17104Flowmaster American Thunder Header Back Exhaust System 17104Flowmaster American Thunder Header Back Exhaust System 17104Flowmaster American Thunder Header Back Exhaust System 17104
$979.99 ea
NEWARRIVING SOONEstimated Ship Date 04/05/2023 (If Ordered Today)21 available from HOLLEY PERFORMANCE PRODUCTS as of 03/21/2023
Model: 3152014
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 2
STORE PICKUP
[More Info]
For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
Features:
  • Mandrel Bent 16 Gauge Aluminized Tubing
  • Moderate Exterior Exhaust Tone
  • Includes Hangers And Hardware For Easy Installation
  • Header Back System
  • Premium Flowmaster Quality
  • 3 Year Limited Warranty
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
Works with Factory manifolds or headers. Connector pipes not included. Fits 1967-1974 Chevrolet Camaro, Pontiac Firebird and 1968-1974 Chevrolet Nova with V8 engines. Convertible models will require adding 3/8-inch of shims to the stock factory X-brace for clearance or purchasing a Hotchkis Performance Convertible brace Part# 1404.

About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Downloads:

Download Name File Size
fm_warranty_general.pdf88.58KB
FM_Warranty_General.pdf88.58KB
NAFTA_COO-2013.pdf105.94KB
17104.pdf102.37KB
17104_instructions.pdf1.69MB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Chevrolet Camaro Base 1968 5.3L / 327 / V8
4.1L / 250 / L6
3.8L / 230 / L6
5.4L / 327 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro Base 1969 7.0L / 427 / V8
5.3L / 327 / V8
5.0L / 307 / V8
4.1L / 250 / L6
3.8L / 230 / L6
5.4L / 327 / V8
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro Base 1974 4.1L / 250 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro LT 1974 5.7L / 350 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro RS 1968 5.3L / 327 / V8
4.1L / 250 / L6
3.8L / 230 / L6
5.4L / 327 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro RS 1969 7.0L / 427 / V8
5.3L / 327 / V8
5.0L / 307 / V8
4.1L / 250 / L6
3.8L / 230 / L6
5.4L / 327 / V8
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro SS 1968 6.5L / 396 / V8
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro SS 1969 6.5L / 396 / V8
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro Z28 1968 4.9L / 302 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro Z28 1974 5.7L / 350 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Chevrolet Camaro 1967 6.5L / 396 / V8
5.3L / 327 / V8
4.9L / 302 / V8
4.1L / 250 / L6
3.8L / 230 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro 1970 6.6L / 402 / V8
5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro 1971 6.6L / 402 / V8
5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro 1972 6.6L / 402 / V8
5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Chevrolet Camaro 1973 5.0L / 307 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird 350 HO 1969 5.7L / 350 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 350 1968 5.7L / 350 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 350 1969 5.7L / 350 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 400 1967 6.6L / 400 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 400 1968 6.6L / 400 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 400 1969 6.6L / 400 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird Base 1967 6.6L / 400 / V8
5.3L / 326 / V8
3.8L / 230 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Base 1968 6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Base 1969 6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Base 1970 6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Base 1971 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird HO 1967 6.6L / 400 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird Sprint 1967 3.8L / 230 / L6 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Sprint 1968 4.1L / 250 / L6 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Sprint 1969 4.1L / 250 / L6 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Pontiac Firebird Trans Am 1969 6.6L / 400 / V8 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 1972 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 1973 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification
Pontiac Firebird 1974 7.5L / 455 / V8
6.6L / 400 / V8
5.7L / 350 / V8
4.1L / 250 / L6		 Single; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X - Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance
Call Tech Support Line For Assistance~Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~Does Not Fit Convertibles w/o X-Brace Modification

Specifications:

2WD/4WD 2WD
California Proposition 65 Required No
Emission Code 5
Exhaust Series American Thunder
Exhaust Type Single
Exit Position Dual Rear
Exit Style Straight
Heat Shield No
Heat Shield Attached No
Inlet Diameter 2.500 in.
Inlet Diameter (in) 2.5
Inlet Inside Diameter N/A
Material Aluminized Steel
Muffler Count 1
Muffler Part Number 42585
Muffler Quantity 1
Muffler Series 80 Series Crossflow
Outlet Diameter 2.500 in.
Outlet Diameter (in) 2.5
Outlet Outside Diameter 2.500 in.
Part Type Exhaust System Kit
Single Dual Dual
Single or Dual Dual
Sound Level Moderate
System Type Header Back
Tail Pipe Diameter 2.500 in.
Tip Diameter N/A
Tip Quantity 0
Tubing Diameter 2.500 in.
Tubing Diameter (in) 2.5
Type of Exhaust Crossmember-back
Warranty Time 36 Months

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Flowmaster American Thunder Header Back Exhaust System 17104:
Reason for Inquiry:
Camaro Depot 2023