just got my piece in from mac performance it is a pipe that replaces the cat the car is really loud now and it feels a little quicker . i was told that the 305 with the 350 exhaust has the 350 cam . by the way it a 1986 305 tpi ws6 best time on g tech was 15.8 at 87 mph with the borg warner 9 bolt 2.77

 

So you just got a 'test pipe' kinda thing? What's the rest of your exhaust? Stock i'm guessin?

 

ITS THE SAME AS AS THE L98 350 THATS WHAT THE MECHANIC SAID HE SAID THERE ISN'T ANY BETTER THAN WHAT I GOT

 

Smoken, the 86 tpi has a 2 3/4" exshaust system and is not mandrally bent. This system flows ok as is but a good custom y-pipe would help a lot. As far as the cam is concerned it is the peanut cam of the tpi world. The 85 305tpi makes 25hp more than the 86 and it's all the cams fault, everything else is the same except the 85 ecm, which is not as good as the 86 ecm. If you want to make some extra power on the cheap I would suggest a cam swap, headers and a y-pipe. Those three mods could net you around 50hp over the stock 190 it's rated at now, maybe more.

Steve

 

would i have to change the exhaust manifolds to put this y pipe in if not where do i get this y pipe
thanks

 

You would not have to change manifolds with a slp y-pipe.I had one on my old car which was an 86 iroc with a 305 tpi.I would'nt suggest it to you though.It was about 200 dollars and the gains were minimal.Get a different cam and headers,the work will be worth it.