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| | | Forums66 Topics128,054 Posts1,055,781 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Oct 2003 Posts: 36 Junior Member | | Junior Member Joined: Oct 2003 Posts: 36 | I have a 350 SB Chevy engine and with all my mods, it should give me around 350 HP. I have an Edelbock 600CFM 4 barrel.
Question: What is a good size diameter dual exhaust system for this engine with a pair of Flowmaster mufflers? Also, should I build in an H pipe?
Richie West
| | | | | Joined: May 2003 Posts: 328 Shop Shark | | Shop Shark Joined: May 2003 Posts: 328 | Richie, I would suggest 2 1/2" pipes. I have heard 2" pipes with flow masters and they sounded like glasspacks. On the other hand, I had a Camaro with dual 3" exhaust with Flowmasters and the sound was deafening. Around 2300 RPMs, the resonation would give me an instant migrane. I have run 2 1/2" exhaust on 475hp small blocks with great success and the sound was awesome. I hope this helps.
Phil
Never hold your farts in. They travel up your spine and into your brain...that is where crappy ideas come from.
| | | | | Joined: Oct 2003 Posts: 36 Junior Member | | Junior Member Joined: Oct 2003 Posts: 36 | Thanks. I decided to have it done at a local establishment and they said the same. I feel more confident to use the 2 1/2 inch pipe.
Richie West
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