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Thinking of duals read this

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Old Apr 17, 2007 | 11:49 PM
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From: Edmond,OK
Default Thinking of duals read this

I got my true duals in Febuary thinking I would gain some power, if so I could take the noise (a little loud for me) but thats not been the case
All runs with lock TC and no other changes to car

10/13/06- dyno day
regular catback with cut out TC locked
open-400.3 rwhp 369.45rwtq SAE 1.02
closed-395.49rwhp 365.76rwtq SAE 1.02
temp 70.91* 26% Humidity

2/5/07- After 3" True Duals H-pipe 1 chambers
398.50rwhp 367.52rwtq SAE 0.99
Temp 56.87* 30% Humidity (colder weather dyno less when I thought I would have gains)

4/14/07- Dyno Day (switched 1 chambers for bullets hoping to gain some power thought these would flow much more than others)
390.03rwhp 362.44rwtq SAE 1.00
Temp 55.98* 38% Humidity

These things are loud as hell, raddle my whole car and I didnt gain S#!T not only that I lost 10.27rwhp and 7.01rwtq and with QA1's went .03 slow and no gain on 60'.

So if you're thinking of getting them think again, a good cat-back will do you better unless you have more cubes and power

Now I know, I am not bitching about how high my numbers are, I am bitching about spending $510 to lose 10hp, now had I lost that and gone faster at the track thats one thing but I didn't. so I might see a nice catback going back on for good in the near future
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Old Apr 18, 2007 | 12:16 AM
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An H-pipe does nothing for performance, only affects the pulses to make it sound better. It would require an X-pipe to make it worthwhile.
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Old Apr 18, 2007 | 12:26 AM
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I am thinking less restrition = more power
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Old Apr 18, 2007 | 12:43 AM
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3" duals are too large.

the right tru-duals will net you more. i picked up 15 rwhp swapping from the borla 3" adjustable catback to the bassani 2.5" tru-duals.

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