What kinda of exhaust system would u guys recommend fo the engine in sig. I'm talking the total system headders to tailpipes.
While sound is important I'm more concerned with performance.
Motor was dyno'd at 442hp and 520tq at the flywheel.

Current exhaust is full length heddman headers prim size? single 3" exhaust with a flow pro muffler. Y-pipe is two 2 1/2 pipe that merge into one 2 1/2" pipe for bout 1 1/2 feet than goes into the 3". Wouldn't this render the 3" pipe usless with the bottle neck there?
Thanks for any help u can give me.

------------------
406SBC
-DART SPORTSMAN 2 HEADS
-RPM INTAKE
-750 SPEED DEMON MECH SEC. CARB
-HEDMAN HEADERS
-COMP CAM EXtreme energy #284 .507/.510
-1.6 roller rockers
-th350 tranny
-posi rear disc

 

4" single or 3" duals.

------------------
89 RS

STILL Looking For:
An 87 IROC-Z28 350 TPI


[This message has been edited by IROCZTWENTYGR8 (edited September 01, 2001).]

 

Go here... www.thirdgen.org/messgboard/Forum6/HTML/002453.html ...and do what Phil Rios Jr. did.

 

Damn that looks nice I'm sold. Does that y-pipe merge into a single 3" or 4"? Either way it's much better than what I gots now. Same goes for the headers.

 

sb406,
They intend the 3" Y to be used with a single 4", but you can use it with a 3" or 3.5" or whatever. For your application I would think the 4" would work best.

 

Thanks for the help.