so would the http://www.g35parts.com/9083/osc/pro...697d8352c08cfb
work with stock pipes and stock headers and exhaust etc... I am wanting to upgrade the cats now and later on down the road the who exhaust. would it be alright and worth it to do 1 part now and 1 later on, or just get them all at once?

 

500 bucks, geez, are there any cheaper ones? have these been flow tested compared to stock?
i think the HR Ypipe would be a better upgrade until i see some hfc flow numbers better than stock

 

any other advice?

 

Have you looked into other brands? Search. I have the Berk HFCs and love them. I certainly didn't pay 500 for them. Try about 30% less and they were brand new too

With the stock exhaust and the HR Y pipe, the sound is sex

 

A specialty shop in the bay area called Zcargarage has done numerous before and after test with dynos and it apparently shows significant gains. If you go to their site and look at their blogs, you will find it. Not to say that it is better then other HFC but over stock, it is without a doubt better. I personally run Test Pipes.

 

thanks, ill check that out. the stockers must be awefully restrictive then.

 

hey, could you post a sound clip or pm me one? thats exactly what i want to do. i think the HR Ypipe is a great idea cause it extends the length that there are dual pipes. that will help for power. and if i can find a flow test showing HFC are significantly better than stock, i would consider those. but, i dont like how loud all the aftermarket exhaust system are, so no catback for me

edit: could you also look to see if that new Ypipe hangs down any lower than your old one? im lowering and dont want that scraping if i got a new one, thanks