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Flowmaster 817720 - Force II Crossmember-Back Exhaust System

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$790.00

$1,032.68

You save: $242.68 (24%) off MSRP

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This part fits

  1. 1973 Chevrolet Corvette 7.4L V8 cid:454 cc:7439
  2. 1973 Chevrolet Corvette 7.4L V8 cid:454
  3. 1973 Chevrolet Corvette 7.4L V8 cid:454 cc:7441
  4. 1972 Chevrolet Corvette 7.4L V8 cid:454 cc:7441
  5. 1972 Chevrolet Corvette 7.4L V8 cid:454
  6. 1972 Chevrolet Corvette 7.4L V8 cid:454 cc:7439
  7. 1971 Chevrolet Corvette 7.4L V8 cid:454 cc:7441
  8. 1971 Chevrolet Corvette 7.4L V8 cid:454
  9. 1971 Chevrolet Corvette 7.4L V8 cid:454 cc:7439
  10. 1970 Chevrolet Corvette 7.4L V8 cid:454 cc:7439
  11. 1970 Chevrolet Corvette 7.4L V8 cid:454
  12. 1970 Chevrolet Corvette 7.4L V8 cid:454 cc:7441
  13. show all...
Authorized Dealer

About this product

Part #: 817720

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 454ci V8 models (or high HP small blocks) features specially tuned stainless steel 50 Series Delta Flow mufflers, a Scavenger X-pipe assembly and 2.50" 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 2.50" polished 304S stainless steel tips that exit within the factory cutout bezels. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

More Details

2WD/4WDRWD
Bullet Point #1Stainless Steel Construction
Bullet Point #2Dyno Tuned For Maximum Performance
Bullet Point #3Patented Delta Flow Technology
Bullet Point #4Lifetime Limited Warranty
Catalytic Converter IncludedNo
Exit PositionDual Rear Exit
Heat ShieldNo
Heat Shield AttachedNo
Inlet Diameter2.5
Inlet Inside Diameter (in.)2.5
MaterialStainless Steel
Mount TypeFlanged
Muffler Count2
Muffler Quantity2
Muffler TypeWelded Baffle
ShapeOval
Single DualDual
System TypeCrossmember Back
System TypeCrossmember-back
Tip CutAngle
Tip Diameter (in)3.00 x 5.50
Tip Edge StyleRolled
Tip FinishPolished
Tip Length (in.)7
Tip MaterialStainless Steel
Tip ShapeRectangle
Tip TypeSingle Wall
Tubing Diameter2.50 in.
Tubing Diameter (in)2.5
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

Eduardo Ambriz

164

Eduardo Ambriz
2014 Ford Fiesta
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What made you choose this particular product?
I chose it because it was a good value in terms of sound for the money. It was also plug and play whereas other systems required a fair bit of modification on my part and I didn't want to deal with that.
Is this your first time buying from this brand? Did you consider other brands?
This is my first time buying from them and I had considered Borla, but went with fFowmaster because of its value.
Was it easy to install? Any installation tips that will help others?
I installed it myself and it wasn't all that easy. The nut is just supposed to be removed from the bolt and the new exhaust should be bolted right back on. The thing is that my bolt was stripped and it was pressed in from the factory so it had to get pushed back out and replaced with a new bolt and nut. Other than that it was plug and play.
Once you've had a chance to use the product, did it meet your expectations?
It is definitely a good value as it gives a deeper tone while making it a bit louder, but not loud enough that it gets annoying. It also doesn't drone too bad when just driving around town.
View on Eduardo's build
Brian Pawlowski

207

Brian Pawlowski
2016 Ford F-150
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?
Sounds good, good sound for price.I have friends who have flow master.
Is this your first time buying from this brand? Did you consider other brands?
First time for flow master. Was looking at Borla but the price tag was just too much. Borla is more expensive because they use 304 stainless steel where flow master used 409 which is a less durable version of stainless steel, and has been known to rust out.
Was it easy to install? Any installation tips that will help others?
Need a lift or need to cut exhaust out if on ground. Lay out parts first and have clamps ready. Overall wasn't bad at all.
Once you've had a chance to use the product, did it meet your expectations?
Yes! It is loud and sounds good. Time will tell about the rust issues.
View on Brian's build
Kaelen Lillard

132

Kaelen Lillard
1994 Lexus LS 400
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 the car to have a rumble but not too loud.
Is this your first time buying from this brand? Did you consider other brands?
Yes, I did consider Magnaflow.
View on Kaelen'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 honestly sounds great
Is this your first time buying from this brand? Did you consider other brands?
No,had a flowmaster on my other truck sounds great
View on Ronnie'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?
To make my camaro actually have a little bark.
Is this your first time buying from this brand? Did you consider other brands?
First time
Was it easy to install? Any installation tips that will help others?
Professionally done
Once you've had a chance to use the product, did it meet your expectations?
Yes. Made the car sound amazing.
View on Jarrett's build
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.

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