I recently purchased the HKS Hi-power catback which i wish i never did after finding out that it is not a true 3'' catback. Read some threads about how the pipe gets smaller towards the end to meet to the stock cat. Well, i am a power freak and if im loosing hp in that pipe taper, then im debating if i should cut the end and weld a 3'' inch pipe and flange. What i want to know, am i loosing a lot oh hp b/c of this? And how it will affect performance when i add a 3'' test pipe and downpipe? Need advise please!!! Also is the reasonator in the catback also restraining from more power?

 

ummm honestly i wouldnt take the time and effort to cut it and weld a new one unless ur gonna do it urself and can do an excelent job if it botherd me that much i would sell it and buy another.... i know my one friend has that dp and he has 8 less hp with the exact same mods as me without it .... but all the cars are different i would think the resignator does restrict even more but i dont know much thier i have the helix without it and its perfectly straight and i know its very good on the power side but keep in mind without the resignator u get LOUD

evoisdream

 

that what i will do to mine. i have the same catback + i got works 3'' dp and 3''tp,do not take the reasonator out it will be too loud its a bit louder then just the catback but go over 4000rpm or so and it wil sound like you have never heared before i am also in orlando if you want to hear or see mine

 

Im not talking about the DP, im talking about the catback

 

Where are u getting it done at? I need to find someone who can do this. I think i might go to gato racing, i have heard awesome things from that shop, and they also make tubular manifolds. HEy by the way, whats your name?

 

Waste of time unless you plan on pushing 400 WHP

 

I am planning on pushin that hp or more in the future! But i dont want any restrictions that will hurt my performance.

 

my bizzle did read it right lol

 

most muffler shops can do it. the name is DOVE

 

I had a muffler shop to weld in a 3" stainless pipe and flange in place of the tapered part for a full 3" on my cat-back.

Al advise me to do it for an extra 5-8 whp. Also I have a 3" H/F so I had to get rid of the taper for less restriction.

 

I got a 5Zigen Miracle and was disppointed for the same reason, that stupid taper! I have a new downpipe and am going to be getting a hi flow cat and when I do I will have the exhaust fixed to make it 3 inch all the way. For 5-8 hp it would be worth the $40-$60 it will cost imo.

 

I have the Helix true 3" cat back. I will trade you.

 

I have this exhaust, with the rest true 3" I cant say i have noticed any performance loss with it in place.