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Old Aug 3, 2008 | 08:56 PM
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Default Header Question?

I have a 99 FRC that I am planning to do a Head/Cam swap in the near future. My question is how much power will I be robbing myself by keeping the stock exhaust manifolds and cats?

The car is stock except for a Borla catback, and I am happy with the sound now. I'm afraid headers and Hi-Flo cats would too loud.

Any opinions on this? Thanks!
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Old Aug 3, 2008 | 09:06 PM
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Originally Posted by rmtt
I have a 99 FRC that I am planning to do a Head/Cam swap in the near future. My question is how much power will I be robbing myself by keeping the stock exhaust manifolds and cats?

The car is stock except for a Borla catback, and I am happy with the sound now. I'm afraid headers and Hi-Flo cats would too loud.

Any opinions on this? Thanks!
You will kill the power if you do heads and cam with stock manifolds. The car shouldnt be too loud if you get cats. I would suggest a set of American Racing Headers, I feelthey are the best fit and performance of any headers available
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Old Aug 4, 2008 | 12:09 AM
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I didnt know there was such a thing as to loud but I agree, stock manifolds will kill power. IMO headers are a must. If it is noise you are worried about get z06 Ti exhaust after the headers. It will quiet it down a ton unless you are really getting on it.
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Old Aug 5, 2008 | 01:52 AM
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Heads/Cam without full exhaust is almost pointless (well not really) as of right now I have 243 heads with 230/232 cam 114+1 lsa and am putting headers on the 15th...You really should install headers before the heads and cam package! Only reason mine doesn't have headers right now is owner took them off to lower the price of my car!
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Old Aug 5, 2008 | 07:13 AM
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Thanks for all the replies. I don't want to inhibit anything, so I will just plan on headers as well. If it's too loud for my taste, I can always go wiith a TI catback as suggested.
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Old Aug 27, 2008 | 02:31 PM
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modded ti cat back is the way to go
no drone, quiet at idle, Wicked at WOT
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Old Aug 31, 2008 | 10:57 PM
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I have a 99 FRC we put it on the dyno before and after Kooks headers and catback,about 25rwhp ,dont bother doing anything before doing exhaust,It did get a bit louder and thats with B&B bullets,but well worth it!!
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