hp with or with out cat back
i'm not a dyno expert, but i assume you would lose about 5-8rwhp with the stock catback.. just a guess on my part but you wouldnt gain hp because the stock catback will be more restricting than running without a catback,
TECH Enthusiast
Joined: Oct 2007
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From: NC
I think I remember seeing a guy with longtubes and with an aftermarket Y and a cutout right after it in the single pipe section, then the stock catback. He got it dyno'd and I think he gained almost 20hp just from opening the cutout instead of sending it through the stock catback... I'll try and find the thread, I could be murdering that story pretty good... Bottom line is your gonna lose power going back to the stock catback...
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From: NC
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it would go like this...or close to it...depending on the catback:
stock catback = 20hp loss
aftermarket catback = 5-10hp loss
if you want to go cheap, and stay stealthy....put a few feet of 3" pipe off the Ypipe, into a 3" cutout, then your stock catback.
quiet when you want it, loud and power when you want it.
stock catback = 20hp loss
aftermarket catback = 5-10hp loss
if you want to go cheap, and stay stealthy....put a few feet of 3" pipe off the Ypipe, into a 3" cutout, then your stock catback.
quiet when you want it, loud and power when you want it.
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Launching!
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From: fenton, MO
if you dont care about the raspy sound then keep the y-pipe, but then if you do add a catback then you will fix the back pressure problem that some people run into about the car not returning to idle very quickly.