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  #1  
Old May 12th, 2004, 12:24 PM
Zimbo76
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Keith Page
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Dual Exhaust

Just wanted to find out if anyone else has installed a dual exhaust system.
I have dual Borla's on mine and it makes a HUGE difference.
It adds a good amount of HP, and my D90 cruises at 80mph around 2700rpm.
The added low growl certainly turns heads.
I had them both professionaly installed, and gave instructions on how I wanted it done. Both mufflers are sitting vertically, and are neatly tucked away from potential rock damage.
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  #2  
Old May 12th, 2004, 04:17 PM
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Do you have any pics of the install? How'd you work the catalytic converter(s)?
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  #3  
Old May 12th, 2004, 05:50 PM
jperakis
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James Perakis
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i have a dual set up as well. i actually hate the way it sounds now, because i was running no cats straight to the two flow masters and it was amazing, but i had to pass smog this week so on went the cats and now it only sounds like a little purr instead of a roar.
the only thing that sticks out under the frame is one of the cats other than that its completly out of harms way.
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  #4  
Old May 12th, 2004, 09:07 PM
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Yousef Hamzeh
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Do you guys have a true double exhaust or only two outlets?

Pic's would be nice
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  #5  
Old May 12th, 2004, 09:48 PM
jperakis
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true double...two cats and two flows
ill try and get pics asap
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  #6  
Old May 12th, 2004, 11:24 PM
Zimbo76
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Keith Page
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Yes, mine is also a true double.
Not to cheap to install, but I think it is worth the extra hp and the sound is just so sweeeeeet!!!
My CC is the low point on the whole system, but still doesnt get out too far.
I tried to take some pics but cant get a good angle without lifting it.
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  #7  
Old May 12th, 2004, 11:52 PM
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James Perakis
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i posted some pics here:
http://www.geocities.com/le_bch/exha...?1084420031855

like keith i had trouble getting a good angle
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  #8  
Old May 13th, 2004, 04:31 PM
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What size tubing did you use Keith? The way I understand it, is that if you are putting dual exhaust on a 241cubic in. engine, you need to use 2.25" tubing to maintain adequate back pressure and add a cross pipe to equalize the pressure. You could acheive the same effect with a 2.5" single exhaust and get the same benefits. Any larger tubing and you lose valuable pressure and the exhaust will not flow efficiently. Anyone have any expertise in this?
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  #9  
Old May 13th, 2004, 06:54 PM
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I just dont think duals are right on a 90, leave that to the guys in the fullsize Z71's and such
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  #10  
Old May 13th, 2004, 10:30 PM
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Jason Habbal
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Yeah i agree...Im sure its nice but I think of Duals on a Z71 or other full-size trucks.....Just my $0.02
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  #11  
Old May 13th, 2004, 10:46 PM
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Hey people, if there's more power, we need it. Someone should make a system with removeable cats as well, unless you're into the emissions thing.
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  #12  
Old May 13th, 2004, 10:53 PM
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I say unbolt the headers swap sides and cut holes in your hood for the pipes to stick out. Yeehaa.

Hey how much did it cost? if you don't mind me asking
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  #13  
Old May 14th, 2004, 04:32 PM
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Yousef Hamzeh
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Quote:
Originally posted by rover4x4
I just dont think duals are right on a 90, leave that to the guys in the fullsize Z71's and such
...so chrome tips are right for a 90
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  #14  
Old May 15th, 2004, 09:44 PM
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I dont have a chrome tip that was the PO's bullshit, I cut it off at the last hanger the 3rd week I had the 90, now I got someyhing a little different to accomadate my mudflaps
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  #15  
Old May 17th, 2004, 05:07 PM
Shane@EVS
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Quote:
Originally posted by TwisteD90
...so chrome tips are right for a 90
:laughing
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  #16  
Old May 18th, 2004, 06:46 PM
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Reviving, as I might need to re-do my exhaust. Cracked Cat...see other thread.

James, may I ask who did the setup for you and combien?
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  #17  
Old May 18th, 2004, 10:36 PM
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James Perakis
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this little shop in orange did it for me. it was 270 for the cats installed, however i already had the dual flows on there, so it would be a little more to recreate what i have on there.
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