[fkemmerer]

Originally Posted by FUNFER2

Very nice Fred !
Thank you for the information, photo's and your site.

Here is my exhaust system.

Header's- are 2" but, look at the attached photo's. Who ever made these, they squeezed the side's inward, like they put them in a vise ? Was this done for bolt clearance ?

How big of a issue is this ?

J-tubes are 1-3/4"
Collectors are 3"
Muffler housing are 4"
Turn outs are 3"

Are the J-tubes also too small and restrictive ?

Man, it looks like I'll have to spend even more, on new headers, flange,
J-tubes, collectors, mufflers, housing, turn outs,....... the entire exhaust system, before Keith's 482.

Thanks,

Kevin,

Its hard to say from the pictures why the fabricator squeezed the tubing. While this is not a good thing, if your primaries are 2" and all of the tubes are more or less consistently modified this way, then it may not be as big of a factor as you think. What will matter most is how well the new heads on the 482 match up with you primaries and whether how restrictive the crush area in the pipes are in that context. This said, an engine the size of a 482 running at 4000 RPM plus needs a free flowing exhaust to perform at its best. I don't know what you have in terms of mufflers/sidepipes but if they are quite enough to make your car "street legal", then that is probably your biggest source of restriction and power loss. You menition that these are 4" on the ouside. What do they look like on the inside? That's what matters at this step in you exhaust system. If you can get something that is more free flowing in that area, I'm guessing it would probably help the most. I am not sure where the "J-tubes" are in the exhaust system - can you clarify?

- Fred