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2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Will a Downpipe add power by itself?

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Old 03-19-2008, 11:51 PM
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Will a Downpipe add power by itself?
2.5' catless downpipe, is it worth installing by itself? Will tuning it with a new downpipe on add any power as well?
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Old 03-19-2008, 11:54 PM
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dp by itself, you will see a little power. the real big power robber is the header. open that up with your dp and you will see power
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Old 03-19-2008, 11:55 PM
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^^^Yup. I would do both of them at the same time, or the header first.
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Old 03-19-2008, 11:56 PM
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my downpipe was the first mod i did no big hp gain but i liked the sound i got from it
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Old 03-20-2008, 04:16 PM
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get both and tuned and u will see the difference
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Old 03-20-2008, 04:19 PM
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Whats the average price for a tune around philly area?
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Old 03-20-2008, 04:59 PM
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i dont know where one is tune time is the closest and thats in toms river nj
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Old 03-20-2008, 08:02 PM
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my xtc downpipe just came in today! i think downpipe itself should add power since the stock cat is restrictive i heard. im going with a header combo tho.
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Old 03-20-2008, 09:03 PM
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yeah headers will really open it up
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Old 03-20-2008, 09:06 PM
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Just go full exhaust. You won't regret it. Im running a CA header, XTC 2.5" de-cat downpipe and an ARK N2 cat-back, and its fantastic!
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Old 03-20-2008, 11:09 PM
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do the whole thing..my downpipe 2.5 with cat gets installed 2morrow am...so c/a header, c/a downpipe, gm performance catback..woot..got mods!?
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Old 03-20-2008, 11:16 PM
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Originally Posted by iLLmaTic3s
do the whole thing..my downpipe 2.5 with cat gets installed 2morrow am...so c/a header, c/a downpipe, gm performance catback..woot..got mods!?
yessir
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Old 03-20-2008, 11:19 PM
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Remember, your exhaust is only as free flowing as your most restrictive part.
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