Flowmaster 817659 - Force II Crossmember-Back Exhaust System

About this product

Flowmaster's Force II Cross Member Back system for the 1970-1973 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 50 Series Delta Flow mufflers, a Scavenger X-pipe assembly and 2.25 in. tailpipes. Like all Flowmaster systems, the pipes are all mandrel bent to reduce any restrictions and maximize performance. The system finishes with rectangular polished 304S stainless steel tips that exit in the factory cutout bezels. The exhaust system is manufactured out of 409S stainless steel and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: Can be used with manifold downpipe kits #81098 (Manual trans.) or #81095 (Auto trans.) to create a complete system.

More Details

See what our community says about flowmaster products

2.4k

Adm PR

2004 Ford Mustang

What made you choose this particular product?

Quality and familiarity with sound.

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?

A little cumbersome on the garage floor, but very straight forward and fairly simple (exception of left side fixed bolt bracket from existing pro chamber :o ).

Once you've had a chance to use the product, did it meet your expectations?

Yes.

Any additional comments?

I sought a sound change toward something a little less aggressive. I never knew what exactly the existing cat back brand was. They were (well, I still have them in the garage) quality built, but very aggressive,, maybe 1 chamber in each muffler albeit thin. The sound went from a rabid crackle to a now lower tone rumble. Aggressive cam sound with the stroke and metallic courtesy sound from headers are all still there. ;)

View on Adm's build

159

Brock Lee

2006 Toyota Tacoma

What made you choose this particular product?

Had em before

View on Brock's build

30

Charles Smith

2013 Dodge Charger

What made you choose this particular product?

This product gives you that fantastic and aggressive sound you expect out of a muscle car. Highly recommend for anyone who wants to add a bit of growl to their ride!

Is this your first time buying from this brand? Did you consider other brands?

This is my first time buying from Flowmaster and I considered corsa as an alternative before settling on the Flowmasters.

Was it easy to install? Any installation tips that will help others?

I had them professionally installed.

Once you've had a chance to use the product, did it meet your expectations?

They sounded exactly how I wanted them to sound. I was overjoyed!

Any additional comments?

They do drone a bit during MDS activation and in the 2.2k rpm range. I would recommend 12inch cherry bomb glasspack mufflers to use in place of the resonators to tone down the drone while maintaining the impressive sound. Your mileage and preferences may vary.

View on Charles's build

242

Nick Baxter

2015 Ford Mustang

What made you choose this particular product?

Sound, makes the car super loud and I love it

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?

Yes I'm a mechanic by trade so I just did it myself

Once you've had a chance to use the product, did it meet your expectations?

Yes good price for what your getting

View on Nick's build

106

Paul Hoffman

2011 Chevrolet Malibu

What made you choose this particular product?

Other exhaust clips with this muffler on the 2.4L engine. I preffered a custom dual exhaust with two of these over pre made catbacks.

Is this your first time buying from this brand? Did you consider other brands?

First!!!

View on Paul's build