Header/Exhaust help please

foonmon85 · 12-12-2006, 04:12 PM

Looking for a stock replacement for factory header. I have a 85 custom deluxe 305,AT catback exhaust with factory y pipe and cat converter. I changed to non-egr intake and carb so i want to clean up the mess left behind by removing smog stuff. I'm not trying to build a racecar just want it to sound/look good. Shorty? full header? leave Y pipe? true duals? HELP
too many options..

Dirt is for racin, asphalt is for gettin there!!!!!!!!!!!!1

Chevy808 · 12-12-2006, 10:02 PM

Quote:

Originally Posted by foonmon85

Looking for a stock replacement for factory header. I have a 85 custom deluxe 305,AT catback exhaust with factory y pipe and cat converter. I changed to non-egr intake and carb so i want to clean up the mess left behind by removing smog stuff. I'm not trying to build a racecar just want it to sound/look good. Shorty? full header? leave Y pipe? true duals? HELP
too many options..

Dirt is for racin, asphalt is for gettin there!!!!!!!!!!!!1

Well, if you got rid of the smog stuff and egr (I'm guessing you're not required to get emission inspections - lucky guy) then you might as well go with full headers, true duals and crossover. Hi-flow cat (unless you don't need them...straight pipe) with Flowmaster mufflers (my preference though).

foonmon85 · 12-13-2006, 02:45 PM

i talked to a summit tech guy and he says keep Y pipe and go with factory replacement shortys cuz if i remove all backpressure ie.. true duals,hi flow cat then it will kill my low end power/torque... since i'm not using hi performance heads/cam etc.. what do you guys think??

mudseeker · 12-14-2006, 05:50 AM

you can still have back pressure with true duals. just make sure you don't over do it on the pipe diameter.

12-12-2006, 04:12 PM	#1
foonmon85 Junior Member Join Date: Dec 2006 Location: Paducah, KY Posts: 3	Header/Exhaust help please Looking for a stock replacement for factory header. I have a 85 custom deluxe 305,AT catback exhaust with factory y pipe and cat converter. I changed to non-egr intake and carb so i want to clean up the mess left behind by removing smog stuff. I'm not trying to build a racecar just want it to sound/look good. Shorty? full header? leave Y pipe? true duals? HELP too many options.. Dirt is for racin, asphalt is for gettin there!!!!!!!!!!!!1

12-14-2006, 05:50 AM	#4
mudseeker mod-o-tator Join Date: Feb 2006 Location: michigan Posts: 4,523	you can still have back pressure with true duals. just make sure you don't over do it on the pipe diameter. __________________ member map add yourself alldatadiy why is it, when i push one for english, i still can't understand the person on the other end?

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12-13-2006, 02:45 PM	#3
foonmon85 Junior Member Join Date: Dec 2006 Location: Paducah, KY Posts: 3	i talked to a summit tech guy and he says keep Y pipe and go with factory replacement shortys cuz if i remove all backpressure ie.. true duals,hi flow cat then it will kill my low end power/torque... since i'm not using hi performance heads/cam etc.. what do you guys think??