hey i was wondering if anybody has had any experience with these (4-2-1) and if they could tell me the good and the bad they experienced with them............ i am looking at some right now and i would be able to get a great deal on them (around 200).......
thanks

 

i installed a Greddy Stainless 4-2-1one piece on my friends '99 SI. fitment was perfect and qualityis great. only thing is, they went from a shiney stainless look to a kinda purplish look from the heat. no big deal, no affect on the header performance or material.

 

sounds like the same one that i am looking at stainless 4-2-1 one piece for my '00 si......... what kind of hp would i expect from this.........5-10?........ also i amgoing to be puttingon a V2 at the same time

 

Yeah ur looking atabout 5-10 hp gain. and a V2 would be good too since headers and intake both work together. it makes the car breath better and it makes the car exhale better, so with the headers and the V2 ur look about about 7-10 hp gainhopefully. that why we often say the best modification to do on ur car would be I/H/E

 

yeah after i save some more money i was hoping to get a greddy exhaust system to go with it..... looking into the EVO2 or the Ti-C.

 

yeah those exhaust systems are good but there pricy as hell

 

is there a very big difference between the greddy and the DC header as far as quality/performance?

oh and the greddy header would be fine in CA right? im just not sure aabout it

 

i have them now on my 2007 civic SI, and there awesome, they make my catback sound much deeper, and it sounds awesome. power is good to. i dont know about 10-20hp gain, maybe like 5hp, but with everything else i have i can deffinatly feel a small difference in performace as well as sound.

 

you have the greddy ones or the DC ones?

 

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