Down pipe and high flow cat to stock exhuast
07-06-2006, 06:50 PM
#1
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Down pipe and high flow cat to stock exhuast
I want to boost performance especialy torque in our '99 EX sedan 5-speed. The cat back was replaced with a 2 inch stock system that is in good shape. The down pipe and stock cat are VERY rusty from NH winters. Can I put in a Stainless 2 1/2 inch down pipe and 2 1/2 inch high flow cat to the cat back and get any gains. My girl will not aaprove of a loud system so the cat back has to stay. 
07-06-2006, 06:56 PM
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Re: Down pipe and high flow cat to stock exhuast (shortlid)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shortlid »</TD></TR><TR><TD CLASS="quote">I want to boost performance especialy torque in our '99 EX sedan 5-speed. The cat back was replaced with a 2 inch stock system that is in good shape. The down pipe and stock cat are VERY rusty from NH winters. Can I put in a Stainless 2 1/2 inch down pipe and 2 1/2 inch high flow cat to the cat back and get any gains. My girl will not aaprove of a loud system so the cat back has to stay. </TD></TR></TABLE>
Gain = Louder Exhaust.. maybe 1-3hp?
</TD></TR></TABLE>Gain = Louder Exhaust.. maybe 1-3hp?
07-06-2006, 07:04 PM
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If you dont have echeck get a "race-cat" and buy a pack of anti foulers for spark plugs. Put the race cat in and put one of the anti-foulers into the o2 plug and screw the 02 sensor back inplace you will get alittle more like 10hp and no CEL.
I did this on my car and the gain was very noticed. Not one of thoughs "well I think it's faster" kinda parts.
Joe
I did this on my car and the gain was very noticed. Not one of thoughs "well I think it's faster" kinda parts.
Joe
07-06-2006, 07:11 PM
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Re: Down pipe and high flow cat to stock exhuast (shortlid)
New Hampshire JUST started echecks so that is a no go. Has to have cat. and O2. 
07-06-2006, 07:12 PM
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Re: (super60)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by super60 »</TD></TR><TR><TD CLASS="quote">If you dont have echeck get a "race-cat" and buy a pack of anti foulers for spark plugs. Put the race cat in and put one of the anti-foulers into the o2 plug and screw the 02 sensor back inplace you will get alittle more like 10hp and no CEL.
I did this on my car and the gain was very noticed. Not one of thoughs "well I think it's faster" kinda parts.
Joe</TD></TR></TABLE>
Did u have any other mods on your car?
I did this on my car and the gain was very noticed. Not one of thoughs "well I think it's faster" kinda parts.
Joe</TD></TR></TABLE>
Did u have any other mods on your car?
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