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Dave Goob Cook · 09-29-2008, 10:12 AM

It's not uncommon to get .03 to .05 performance improvement from the correct length collector tube. Can't say what that means in HP or torque.
I have only used the old paint stripe on the tube, and cut it where the paint changes color, to determine the "correct" length.
Start with about 18" on there and cut it after a few passes to get the length.

09-29-2008, 10:12 AM	#2
Dave Goob Cook Member Join Date: Dec 2006 Location: Indy Posts: 422 Likes: 0 Liked 0 Times in 0 Posts	Re: Header Collecter Extensions It's not uncommon to get .03 to .05 performance improvement from the correct length collector tube. Can't say what that means in HP or torque. I have only used the old paint stripe on the tube, and cut it where the paint changes color, to determine the "correct" length. Start with about 18" on there and cut it after a few passes to get the length.