gotxqss Posted September 14, 2009 Share Posted September 14, 2009 Well finally after a lot of slacking on my swap the car has finally fired and actually got to drive it around for 10 minutes yesterday to check for leaks, make sure everything is working fine ect. YESSSSSSSS!!!! Can't wait to get the lil things buttoned up for reliable driving. Anyways, I tried looking around for exhaust stuff here but didnt find too much info. Figured maybe we can get a thread with everything we need to know. Couple questions came to mind before going and getting the exhaust done. 1. How far after the headers did you mount the 02 sensors? 2. Did you even use the rear 02's? do you need them? Can i just unplug or do i need the simulators instead? 3. what size diameter are you using? 4. What material? Don't know if I wanna go all the way with stainless yet 5. Running an X pipe or Y? If so what sizing and configuration? 6. Duals or single outlet? 7. Mufflers - what fits in the stock location? what are you running? happy with the tone/noise levels? If you have any pics that would be sweeeeettt and a vid of the sounds would be even better. Personally I was thinking 2.5" into a Y then id like 3.5" from there back but might be restricted to 3" for clearance. Would like a straight through muffler in the stock location to keep things sorta stealthy but I have a feeling it might be a little loud to sound stock of course. Thanks Guys Quote Link to comment Share on other sites More sharing options...
m1noel Posted September 14, 2009 Share Posted September 14, 2009 I used 3" stainless to a Y behind the tranny, into a magnaflow resonator, then 3" single into a Magnaflow muffler in the stock location. Definately not quiet under throttle but very quiet at idle. O2 sensors just after the collector and no rear O2's. http://videos.streetfire.net/video/1978-280Z-with-05-GTO-LS2_92197.htm Old walkaround video with exhaust sounds. mike Quote Link to comment Share on other sites More sharing options...
gotxqss Posted September 15, 2009 Author Share Posted September 15, 2009 On those removal of the rear 02 sensors. I am cleaning up the harness alot of the unused plugs/wires that are left after. Can I just remove the wires associated with the rear 02's up to the ecu? thanks Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted September 15, 2009 Share Posted September 15, 2009 I had 3" dual with an X pipe. 9" straight through oval Magnaflow mufflers, as well as 2 resonators. o2 sensors just after the collectors also. The car is loud. No rear o2 sensors, I trimmed the wires all the way up to the PCM plug. Video of car with just resonators installed (no mufflers): I don't have any video's of the car with mufflers on, but its still pretty loud. Quote Link to comment Share on other sites More sharing options...
ColtGT4g63 Posted September 15, 2009 Share Posted September 15, 2009 Personally I was thinking 2.5" into a Y then id like 3.5" from there back but might be restricted to 3" for clearance. Would like a straight through muffler in the stock location to keep things sorta stealthy but I have a feeling it might be a little loud to sound stock of course. Thanks Guys I use to run my exhaust exactly like this, I would always drag the 3.5" straight section on the ground. But seemed to work pretty good. I had a Round magnaflow 3.5" muffler back there. The exhaust like this was also pretty loud, Here's a video of it on the dyno running this exhaust. Quote Link to comment Share on other sites More sharing options...
janaka Posted September 15, 2009 Share Posted September 15, 2009 i am 2.5" off the collectors to single 3" all mandrel bent, no res, one muffler. It's noticably V8 at idle, and at WOT its V8 heaven. Loud but I can talk on the phone when idling so its all perception I guess. Its shake the rear view mirror loud at WOT and anything above 1/3 throttle. I wouldnt have it any other way Quote Link to comment Share on other sites More sharing options...
RUZN Posted September 15, 2009 Share Posted September 15, 2009 I run a 3" Pipe from the Downpipe to the rear end (no cat or resonator) and to finish it off I also have that Same looking Magnaflow 3" inlet 3" outlet and its a great tone. But I run a turbo so its prolly quieter that a N/A motor. But everyone loves the tone... I have always run Magnaflow though so I just like the sound better than a Whiney or obnoxiously loud Fart can LOL. Quote Link to comment Share on other sites More sharing options...
Lighft01 Posted September 18, 2009 Share Posted September 18, 2009 2.5" duals, x pipe, 2 mufflers (one per bank) and dumped under the car. Sounds great, good rumble at idle, and smooth sound at WOT. NO rear o2's, you can have them tuned out per HP tuners. Quote Link to comment Share on other sites More sharing options...
dtaylor Posted September 19, 2009 Share Posted September 19, 2009 My set up is 2 1/2 Mandral bent system with Borla's.. Quote Link to comment Share on other sites More sharing options...
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