What is the difference between my 85 z-28 with TPI and a 86 with TPI? I want to get a better exhaust system but i have not seen any for my year with my motor.

can anybody point me in the right dirrection?

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1985 Z-28, tpi, basically stock......so far

SEE YOU LATER INTIMADATOR
R.I.P. #3

 

anyone?

 

in 85 86 the 305 tpi exhaust systems were part of the ws6 package and they were a 3 inch pipe. my mechanic says there tth best

 

In '85, the cat had 4-bolt flanges on each end and I think the Y-pipe, cat, and intermediate pipe were 2 1/4". In '86, they changed them to a slip-fit connection at the front (Y-pipe to cat), a 2-bolt ball-flange connection at the rear (cat to int. pipe), and they were all nearly 3". You can see pix of these at:

http://www.eecis.udel.edu/~davis/z28/buildup/headers/


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Greg Westphal
'87 IROC 305TPI/A4

 

So if I were to completely build up a new system, can I use any exhaust from any manufaturer for any thirdgen? Any If so where can I get the best system? soundwise and power wise