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Old Aug 26, 2004 | 06:58 PM
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i have slp loudmouth and i just ordered mac true-fit long tubes with off road y-pipe and no cats. what kind of rw gains should i achieve with this setup?
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Old Aug 27, 2004 | 08:18 AM
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you mean mac mid lengths . figure ~20rwhp, little more with tune.
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Old Aug 28, 2004 | 12:58 PM
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Originally Posted by jrp
you mean mac mid lengths . figure ~20rwhp, little more with tune.
haha...yeah my bad. ok thanks for the info. how much could i get out of a good ls1 edit and this exhaust?
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Old Aug 28, 2004 | 05:58 PM
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Get a tune and port the primaries on the Macs, ~30 rwhp with a good tune
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Old Aug 29, 2004 | 01:16 AM
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i dont know if its as bad with macs, but i really wouldnt keep the loudmouth without cats. with my lt's and ory it sounds TERRIBLE. just fair warning to ya
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Old Aug 29, 2004 | 01:20 AM
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Originally Posted by God of Thunder
i dont know if its as bad with macs, but i really wouldnt keep the loudmouth without cats. with my lt's and ory it sounds TERRIBLE. just fair warning to ya

i second this, i made the mistake of a loudmouth without cats. i think a bullet muffler to put in place of the resonator would be around 40 bucks or so, and another what 50 to install tops? i would suggest that set up

30 rwhp...ehhh with a good tune yeah its acheivable. but every car is different so to be safe ill say 20-30 rwhp with tuning.
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Old Aug 29, 2004 | 06:19 PM
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ok...so i have one more question. can anybody lead me to a place where i can read a "how-to" on installing these headers and y-pipe??? please let me know cuz i wanna get ew on asap. thanks
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Old Aug 29, 2004 | 08:28 PM
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I think there is a sticky in the new LS1 enthusiasts section that has a bunch of sites with how-to information... Good luck with the installation... 20-30RWHP sounds like a good estimate...
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