Y-pipe. You could even add cats.
sick of true duals
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Joined: Feb 2005
Posts: 433
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From: Elizabeth City, NC
sick of true duals i am getting sick of having true duals...so damn loud pissing everyone off that lives in the neighborhood, resonance in the passenger area.... i am seriously thinking of scraping it and going with a good cat back. what are the HP differences in a 2.5" true dual system and a 3" cat back?
here's the dyno results when i swapped from borla w/small plate to bassani 2.5" tru-duals.
the bassani is alot quieter inside the car than the borla. the bassani is also ran all the way out the back. sound bytes here http://www.vincihighperformance.com/...s1exhaust.html top one is my 00 formula w/stock cats and manifolds. the lower one is the wife's 99 formula w/bassani headers and gutted cats at the time.
the bassani is alot quieter inside the car than the borla. the bassani is also ran all the way out the back. sound bytes here http://www.vincihighperformance.com/...s1exhaust.html top one is my 00 formula w/stock cats and manifolds. the lower one is the wife's 99 formula w/bassani headers and gutted cats at the time.
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Joined: Jun 2004
Posts: 1,501
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From: Ft. Irwin, California (But Virginia is home)
Originally Posted by badtexasZ28
i am running catless with 18 inch sweet thunders. do the header inserts work all that well? if i put cats back on how much quieter would it be?
Originally Posted by AsianIce25
just an idea...header inserts. little or claimed same or more power and less noise. theres cones types and then diffuser types. summit has em...
Which type is better, cone or diffuser? I am in the same boat except I am only annoyed with the rattles. I love the sound
. This might be the answer I am looking for. How do they install? Do they just slide in? 
Originally Posted by badtexasZ28
i am getting sick of having true duals...so damn loud pissing everyone off that lives in the neighborhood, resonance in the passenger area.... i am seriously thinking of scraping it and going with a good cat back. what are the HP differences in a 2.5" true dual system and a 3" cat back?
Originally Posted by jm8881
What td setup are you running? If it's dumped before the axle I'd cut the turn downs off and see if you like it better that way before buying a y pipe setup again.
Do not use the Car Chemistry inserts that Summit sells unless you want to lose alot of power! I installed a 3" 2 disk version into my 3" I pipe right before my cutout to cut down on rasp with my old exhaust setup and it lost me 33rwhp @ 35rwtq over an open cutout.
I had the TSP TD dumped at the axle and even though I loved the sound it was toooo much after a year. I even tried high flow cats to quiet them down but still too loud.
I've had 7 iterations of exhaust systems on my car in the 6 years that I've owned it. The last and final version is Hooker 3" Cat Back (second time I've bought this cause I was happy with it before getting the TD fever)
...I also have Kooks 1 7/8" header with Kooks 3" y-pipes with high flow cats. With the high flow cats there is no rasp.
I'm sure I lost some HP but the car feels like it has much more torque and sounds great.
I've had 7 iterations of exhaust systems on my car in the 6 years that I've owned it. The last and final version is Hooker 3" Cat Back (second time I've bought this cause I was happy with it before getting the TD fever)
...I also have Kooks 1 7/8" header with Kooks 3" y-pipes with high flow cats. With the high flow cats there is no rasp.
I'm sure I lost some HP but the car feels like it has much more torque and sounds great.
HOOKER cat-back. sounds great and pretty loud at WOT. but when idling and cruising it's so quiet you hear the whine of your drivetrain more than the exhaust note. 
that's if the windows are rolled up. haha. very nice cat back. best of all worlds. i love mine. i'm running l.t.'s w/ a 3" o.r.y. and it sounds like a stock camaro w/ a catback. really quiet.
that's if the windows are rolled up. haha. very nice cat back. best of all worlds. i love mine. i'm running l.t.'s w/ a 3" o.r.y. and it sounds like a stock camaro w/ a catback. really quiet.
Originally Posted by 99Hawk262
Which type is better, cone or diffuser? I am in the same boat except I am only annoyed with the rattles. I love the sound . This might be the answer I am looking for. How do they install? Do they just slide in?
. This might be the answer I am looking for. How do they install? Do they just slide in?i would definetely stay away from cats, theyre too expensive and take away too much power, besides, i love the smell of gas. go with the cone type insert and try them out. I suppose these inserts may lose you a few ponies, but def not 30. you have to think, any time theres less noise, theres got to be more restriction (not in all cases, but most). go with the cones...
heres the part numbers for the dynatech cones. Summit of course...
3" dtc-72-32520
3.5" dtc-72-32510
$69 each, so about 140 for the pair. a lil expensive, but still less than the price of one cat and no power loss...
3" dtc-72-32520
3.5" dtc-72-32510
$69 each, so about 140 for the pair. a lil expensive, but still less than the price of one cat and no power loss...