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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,264 Posts1,058,358 Members48,485 | | 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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Aug 2013 Posts: 568 Shop Shark | | Shop Shark Joined: Aug 2013 Posts: 568 | I believe it's for the V series engines. To help promote scavenging of the exhaust gasses. X pipes = more top end pull if you have the ponies to worry about it. On a stock/mild build I wouldn't waste the money as there will be little to no noticeable benefit. Not trying to burst your bubble.
The equal length is for the header tubes. Good luck with your project.
Last edited by Hollow65; 09/12/2014 3:19 AM.
I can explain it to you, I can't understand it for you.
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