I have ran into some issues. I just found out that I can't compete in NHRA SFWD because I do not have an exhaust that exits the rear of the crar. I have a 3" dmh cutout with a turndown right in front of my drivers side wheel well, and the rest of the exhaust is my stock 2.xx inch piping with the stock muffler, so What I was wondering is, perfomance wise, whick is better, my cutout that dumps like 18" from the turbo, or a full 4" exhaust? Thanks guys.

 

so u are gonna go 3" downpipe to 4" exhaust....? '

or 4" exhaust from turbo back?

id say 3" open downpipe....but like you said...you can compete in SFWD

 

Well I will use a 4" dp if I go the full 4" route, but I just dont like the fact that you have to run a Full exhaust, that sucks.

 

i think a full 4" is better becuase its MUCH quieter

 

will the 4" perform as well ast the 3" cutout? Also, does anyone make any good 4" mufflers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6-213 &raquo;</TD></TR><TR><TD CLASS="quote">will the 4" perform as well ast the 3" cutout? Also, does anyone make any good 4" mufflers?</TD></TR></TABLE>

the 3" cutout will perform better then the full 4" exhuast.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Geoff &raquo;</TD></TR><TR><TD CLASS="quote">i think a full 4" is better becuase its MUCH quieter</TD></TR></TABLE>

but during normal driving the ecutout is closed.... so the car would only be loud when its open and at WOT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6-213 &raquo;</TD></TR><TR><TD CLASS="quote">will the 4" perform as well ast the 3" cutout? Also, does anyone make any good 4" mufflers?</TD></TR></TABLE>

http://www.magnaflow.com/02product/02race.asp

 

thanks

 

I have 4" downpipe and 4" exhaust on my car and I love it. It is very quite and it performs well.

 

Turbo cars love open downpipes, less restriction. But if you can't have a cut-out for SFWD....go 4" DP to 4" exhaust.

 

exactly what i was gonna say..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6-213 &raquo;</TD></TR><TR><TD CLASS="quote">will the 4" perform as well ast the 3" cutout? Also, does anyone make any good 4" mufflers?</TD></TR></TABLE>

3" open dump would flow better than full 4", but by how much and how much power difference would there be?

Burns Stainless also makes some good lightweight race mufflers to any diameter/length you need.

 

How does 4 inch fit under the car.. good? does it clear in the back were it goes between the suspension?

 

There's the saying "BEST Exhaust for a turbo car, Is NO exhaust at all" Well that is true if you are all about the track and street racing. Just remember all cars need SOME back pressure. But if your asking for whether 3" Dump Or 4" Full out. 4" full out you will find is all the power of a 3" inch dump. But without the Noise Polution ticked and the smell of exhaust when you'r windows are down.

4" Turbo Back

Its like Really good Safe Sex