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1974-79 Corvette C3 5.7L- Crossmember back Force II Exhaust System 817661YouTube Button

Flowmaster Force II Crossmember-back Exhaust System

1974-1979 Chevrolet Corvette 350ci engine. (Not Emissions Legal for 1975-1979 Vehicles).

PART# 817661

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Estimated shipping date: 03/12/2021
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Moderate to mild sound


The Flowmaster Force II® Crossmember-back system for 1974-1979 Chevrolet Corvette is perfect for the person looking for a moderate exterior and mild interior exhaust tone, with all of the performance benefits that you would expect from Flowmaster®. This stainless steel exhaust system features mandrel-bent 2.25-inch tubing flowing into a pair of specially tuned 60 Series™ Delta Flow® performance mufflers and our exclusive Scavenger Series® X-pipe assembly for maximum power and a deep unique tone. The tailpipes are finished off with a pair of highly polished 3.00-inch stainless steel angle cut tips for an aggressive look and the exhaust system is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: Intended for Off Road Use Only on 1975-1979 Models.


  • Specially Tuned 60 Series Performance Mufflers
  • Exclusive Scavenger Series X-pipe Cross-over
  • Dyno Tuned For Maximum Performance
  • All Stainless Steel Construction
  • Lifetime Limited Warranty
  • Delta Flow Technology


Catalytic Converter IncludedNo
Emission Code4
Exhaust SeriesForce II
Exit PositionDual Out Rear
Heat ShieldNo
Inlet Diameter (in)2.25
Material409 Stainless Steel
Mount TypeFlanged
Muffler Part NumberKit Only
Muffler Quantity2
Muffler Series60 Series Delta Flow
Muffler TypeWelded Baffle
Outlet Diameter (in)2.25
Product TypeExhaust System
Single DualDual
Sound LevelModerate/Mild
System TypeCrossmember-back
Tip CutAngle
Tip Diameter (in)3
Tip Edge StyleCut
Tip FinishPolished
Tip Length (in)4.75
Tip LogoEmbossed
Tip MaterialStainless Steel
Tip Quantity2
Tip ShapeRound
Tubing Diameter (in)2.25
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817661



This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Tech Resources

Fits 1974-1979 Chevrolet Corvette with 350 Cubic inch engine. (Not Emissions Legal for 1975-1979 Vehicles).


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