Special discount price: enter JUNE at checkout for 9% off. *
close promo banner icon

Exhaust System Kit

Flowmaster - Force II Crossmember-Back Exhaust System (817661)

$775.95

$862.95

You save: $87.00 (10%) off MSRP

stock messaging Out of StockOut of Stock
Order now to be added to the priority list
Check to see if this fits your vehicle

This part fits

  1. 1979 Chevrolet Corvette 5.7L V8 cid:350
  2. 1979 Chevrolet Corvette 5.7L V8 cid:350 cc:5733
  3. 1978 Chevrolet Corvette 5.7L V8 cid:350
  4. 1977 Chevrolet Corvette 5.7L V8 cid:350
  5. 1976 Chevrolet Corvette 5.7L V8 cid:350
  6. 1975 Chevrolet Corvette 5.7L V8 cid:350
Authorized Dealer

About this product

Part #: 817661

Flowmaster's Force II Crossmember-back system for the 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 bolt-on DOR (Dual Out the Rear) system for the 5.7L V8 features specially tuned stainless steel 60 Series Delta Flow mufflers, a Scavenger X-pipe assembly and 2.25" 409S stainless steel tailpipes. Like all Flowmaster systems, the pipes are all mandrel bent to reduce any restrictions and maximize performance. The system finishes with 3.00" polished 304S stainless steel tips. The exhaust system is covered by Flowmaster's 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.

More Details

Catalytic Converter IncludedNo
ColorBlack
Exhaust SeriesForce II
Exhaust TypeDual
Exit PositionDual Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.250 in.
Inlet Inside Diameter2.250 in.
MaterialStainless Steel
Mount TypeFlanged
Muffler Part NumberKit Only
Muffler Series60 Series Delta Flow
Muffler TypeWelded Baffle
Outlet Diameter2.500 in.
Outlet Outside Diameter3.000 in.
ShapeOval
Single or DualDual
Sound LevelMild/Moderate
System TypeCrossmember Back
Tail Pipe Diameter2.250 in.
Tip CutAngle
Tip Diameter3.000 in.
Tip FinishPolished
Tip LogoEmbossed
Tip MaterialStainless Steel
Tip Quantity2
Tip ShapeRound
TitleFlowmaster 817661 Crossmember-back System - Force II - 74-79 Corvette - Mild/Moderate Sound
Tubing Diameter2.250 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
sound and build quality
Is this your first time buying from this brand? Did you consider other brands?
no
Was it easy to install? Any installation tips that will help others?
yes, pretty straight forward install. make sure there is clearance in height (preferably have it on a lift) for the muffler section to the tail pipe as there is considerable bend to manipulate in order to remove it. Also, just unbolt the hanger vs pilling off the gromet, seemed much easier to do.
Once you've had a chance to use the product, did it meet your expectations?
yes.
Any additional comments?
gauging sounds both in and outside of cab. with the headers, no resonator, and an overall diameter increase to a single 3 1/2" (4" tail), even with the 50 series HD muffler, it is surprisingly alot louder.
View on Adm's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
It came installed on the car when I purchased it.
Is this your first time buying from this brand? Did you consider other brands?
First time with this brand. I would consider going to Magnaflow or Borla again, although the Flowmasters do sound amazing, they are a bit loud for normal use.
Was it easy to install? Any installation tips that will help others?
Came installed on the car, but the fit is good.
Once you've had a chance to use the product, did it meet your expectations?
These make the car sound very aggressive, you can hear the car coming from the other side of my small town. So they sound bad ass...but can be annoying for your neighbours and police.
View on Brett's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Previous owner installed it.
Is this your first time buying from this brand? Did you consider other brands?
Yes but it looks and sounds awesome!
Once you've had a chance to use the product, did it meet your expectations?
Sounds amazing for a v6
View on Nate's build
Devin Telschow

41

Devin Telschow
2008 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
I wanted to make my car a bit louder without breaking the bank
Is this your first time buying from this brand? Did you consider other brands?
Yes
Was it easy to install? Any installation tips that will help others?
It was super easy. The install required only handheld tools and about an hours worth of time.
Once you've had a chance to use the product, did it meet your expectations?
It exceeded my expectations and provided a really nice sound.
View on Devin's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Deeper louder tone
Is this your first time buying from this brand? Did you consider other brands?
no, but i did consider Borla but was too quiet
View on Logan's build

MOST POPULAR Cat Back Exhaust

TOP RATED Flowmaster Exhaust

  • Flowmaster - Force II Cat Back System  photo
    MFR# 17106Flowmaster - Force II Cat Back System
    $479.95$533.95
    Save $54.00 (10%) off MSRP
  • California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

    *Some manufacturer restrictions apply.

    About Flowmaster

    Manufacturer of performance exhaust systems, mufflers, cold 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.

    Benefits of adding this mod

    An upgraded exhaust system is one of the easiest modifications that offers an immediate, noticeable performance improvement. Whether you’re cruising an M3 or modding a diesel truck, an upgraded exhaust will open up the restrictive factory system, allowing your engine to breathe better and deliver peak power! From lighter weight exhaust headers to improved cat-back systems, to better sounding mufflers, modifying your exhaust setup is a great place to express the character of your ride in a unique and cost effective way. Whatever you’re looking for in a modified exhaust system, we can provide the absolute best systems to make your vision a reality.

    shipping-worldwide-jpg

    we ship worldwide!

    Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

    + FREE GROUND SHIPPING ON U.S. ORDERS OVER $99
    International shipping icon
    Have a question? Ask an Expert!

    Finding the best parts can be tricky

    - but not to worry! Our team of experienced American Muscle, JDM, Euro, and off-road tuners are ready to answer your questions (as long as we’re not in the garage wrenching on our own builds).

    chat-iconLive Chat
    Ask our expert tuners anything!
    call_iconCall Us
    1 (800) 959-4304
    featured vehicle testimonial imagequote icon

    Wheelwell wants to be the new online hub for car parts and accessories.

    author testimonial image
    featured vehicle testimonial imagequote icon

    Wheelwell helps you organize all your stuff for your car, I’ve loaded all my cars on Wheelwell and you can see all the parts I’ve put in them and that may help you make a decision with your own build.

    author testimonial image

    Matt Farah

    Smoking Tire / The Drive

    featured vehicle testimonial imagequote icon

    Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

    James M.

    Ford Focus ST

    featured vehicle testimonial imagequote icon

    Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

    Wallace R

    Chevrolet Silverado 1500