Flowmasters
Thread Starter
Racer
Joined: May 2006
Posts: 426
Likes: 16
From: Concord CA
Flowmasters
Anyone put a Flowmaster 50 series #8430522 (3" in/duel 2 1/4" out) on there C4 ?
I see that it is listed as having a 17" case and the stock one on my 88' is 14" case.
If they are to long, then I might have to go with one of the two chamber 40's or 44's (9430462) with a 13" case.
I see that it is listed as having a 17" case and the stock one on my 88' is 14" case.
If they are to long, then I might have to go with one of the two chamber 40's or 44's (9430462) with a 13" case.
Last edited by bczee; Dec 14, 2008 at 09:01 PM.
Pro
Joined: Jan 2008
Posts: 584
Likes: 1
From: Near Lockport NY Black 1986 Coupe
I have a super 44 series 3" inlet/2.5" dual outlets in place of the rear y-pipe section and it fits perfectly. Anything longer and the pipes coming out will be angled too sharp to flow effeciently, I had to remove the spare-tire carrier to prevent this. I would NOT recommend keeping the stock rear pipes.
Get the 13" case, they sound better anyway.
Get the 13" case, they sound better anyway.
Thread Starter
Racer
Joined: May 2006
Posts: 426
Likes: 16
From: Concord CA
Master_Shake... thanks for the input.. I called Flowmaster and talked to a tech on the phone, He told me some there cat back and muffler system are based on the 50 series Muffler.. so I should be good to go with a 3" w/duel outlet 9430522's.. I will get my muffler/welder to put them in place of the stockers.. less than $200 from summit and welding well be a six pack or something ! so. that is a lot cheaper that a how system when I only needed new mufflers.. the 50's are the Delta Flow 3 chamber as compared to the 44 or 40's that are 2 chambers..
Pro
Joined: Jan 2008
Posts: 584
Likes: 1
From: Near Lockport NY Black 1986 Coupe
Whoa now, you mean removing the factory mufflers and replacing with 2flowmasters? You'll want to go smaller than 3" inlet then. Are you set on the 50 series? If so, 525552 would be better with 2.5" inlet and dual 2.25" outlets. If you'd like to go 40 series, then 9425422 is what you want. Super 44s? - 9425472.
50 series have a mellow tone, 40s are louder, and super 44s are very aggressive. If you want clips of each sound, you can either listen to them on flowmaster.com or check out the vid in my sig for the super 44. The reason for going dual outlets is to keep the stock corvette look, as opposed to a single outlet, and 2.25" is small enough to keep droning down yet big enough to improve performance. You'll also want to get some tips as well, because the mufflers aren't polished.
50 series have a mellow tone, 40s are louder, and super 44s are very aggressive. If you want clips of each sound, you can either listen to them on flowmaster.com or check out the vid in my sig for the super 44. The reason for going dual outlets is to keep the stock corvette look, as opposed to a single outlet, and 2.25" is small enough to keep droning down yet big enough to improve performance. You'll also want to get some tips as well, because the mufflers aren't polished.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
I have 50 series 2.5's on my Jeep CJ7 V8 and the sound is awesome. Low rumble almost quiet. The sound comes out the back with low in cab noise on my fiberglass bodied CJ. I recommend em. I have muffler eliminating system on my C4, no idea of brand and it also has a low rumble, aggressive sound under acceleration and some in cab noise but acceptable under 70. Check those out too. My .02
Thread Starter
Racer
Joined: May 2006
Posts: 426
Likes: 16
From: Concord CA
Pro
Joined: Jan 2008
Posts: 584
Likes: 1
From: Near Lockport NY Black 1986 Coupe
Well, considering the stock cat-back is 2.25", and 3" is too big for a stock L98, the middle-ground for most L98 exhaust systems is 2.5". It will support over 500chp, and you will not lose as much low-end torque as you would going to 3". Even though 2.25" would be ideal for the current situation, if you have any plans for future modifications, 2.5" is a level-field for mild to moderate mods.
That's why I recommend 2.5" pipes.
That's why I recommend 2.5" pipes.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski