Feels like I lost some HP after adding Mustang SLP xpipe and Magnaflow Catback?
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Joined: Apr 2006
Posts: 9
From: CT
Feels like I lost some HP after adding Mustang SLP xpipe and Magnaflow Catback?
I had the x-pipe and magnaflow catback put on and it seems as if I lost some power off the start when in (D)rive?? Any opinions or suggestions on the next step to regain it? The car is stock other than that. Anyone recommend a chip or cold air intake to help? Thanks!!
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when you decrease back pressure with your exhaust mods, your low end power will decrease slightly...rev it all the way to redline and you will feel a gain. A more free exhaust flow is meant to increase top end power. Mine did the same thing. You may want to increase the inlet of air with a cold air intake, larger throttle body and better intake plenum and then get an xcal and have the car tuned for the increased flow. You will really feel a difference after that.
Senior Member
Joined: Feb 2006
Posts: 1,103
From: tennessee
Originally Posted by zigzagg321
when you decrease back pressure with your exhaust mods, your low end power will decrease slightly...rev it all the way to redline and you will feel a gain. A more free exhaust flow is meant to increase top end power. Mine did the same thing. You may want to increase the inlet of air with a cold air intake, larger throttle body and better intake plenum and then get an xcal and have the car tuned for the increased flow. You will really feel a difference after that.
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Joined: Jan 2006
Posts: 900
From: Sumter, SC
Well, in dyno's i've never seen anyone install an x pipe and catback and lose an HP or TQ on the low side. usually they gain alittle HP and TQ on the low side and gain alot more around 4500 and up, especially if your an auto and no need to take it to 6K, maybe 5K. The cold air will add some more TQ on the low side and maybe 5HP to the wheels, so that will help.
You probably definitely feel the upper band, making you think your lower grunt has lowered.
You probably definitely feel the upper band, making you think your lower grunt has lowered.
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