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#1
01-06-2004, 03:45 PM
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Si header on my STD hatch
Hi,
Since I am planning on replacing my head gasket in the hatch and I have to remove the header anyways to get to the head I decided to take the very restrictive STD header (with a CAT on it) and replace it with my SI one that I got from the SI engine I had. Will it bolt right in place of the STD header and connect to the exhaust? I was planning on buying an aftermarket header but since im low on $ and I removing the header anyways i want to know if its possible to do this. I should get a decent increase in HP right? I have the MPFI swap completed also. Thanks
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1990 Honda Civic LX 5 Speed 1.5 Liter SOHC K&N Cone Filter APC Short Shifter 1988 Honda Civic STD Hatch 
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#2
01-06-2004, 04:02 PM
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it will bolt right up and you will have no cat.
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#3
01-06-2004, 04:46 PM
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Will it be a lot louder with no cat?
Thanks
__________________
1990 Honda Civic LX 5 Speed 1.5 Liter SOHC K&N Cone Filter APC Short Shifter 1988 Honda Civic STD Hatch
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#4
01-06-2004, 06:48 PM
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Re: Si header on my STD hatch
Yes, lots louder with no cat. Depending on if you have factory muffler or straight through design style.
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#5
01-06-2004, 07:49 PM
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Re: Si header on my STD hatch
Ok, how much HP do you think the STD cat is restricting the car with an MPFI swap?
__________________
1990 Honda Civic LX 5 Speed 1.5 Liter SOHC K&N Cone Filter APC Short Shifter 1988 Honda Civic STD Hatch
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