i've been doing my researching and everything and decided to combine these two together. i already have an uppipe made by helix. does anyone know if this is a good sleeper/stealthy setup? how much HP should i be yielding with this setup and how much am i losing compared to running pure catless?

 

good setup, make sure to ge tthe flat flange

 

hezlok- the Helix Down-pipe/ Borla Hush TBE combo is really stealthy. It's not nearly as loud as a Helix/HKS Exhaust combo, yet you still reap the gains from having a full 3" TBE. As for running a Catted DP compared to a Catless DP, approximately 5-10 WHP is lost. The upside to running a Catted DP is that you don't have that strong exhaust odor, especially during startups.

-Soren

 

I just got this setup (w/ catted DP) installed on my sti and tuned saturday....251hp and 263tq on a mustang dyno w/ a UTEC. Sounds GREAT and still fairly quiet...no freeway drone either.

I bought mine from Soren...A+ service from them.

 

sounds sweet... does anyone know hwo much HP gain it is for pure carless setup

 

hezlok- on a Mustang Dyno, the Catless Up/Down-pipe w/ 3" Catback Exhaust system will yield approximately 25-30 WHP.

-Soren

 

5-10 whp lost.... oh well i wanna be sleeper

does anyone know if i upgrade to a bigger turbo, vf34, would it be better if i ran pure catless? or can i stick with this stealth setup? and will teh upgraded turbo make my car louder?

 

Does LA have emissions? I currently live in Hawaii, with no emissions but a safety check which is equally as annoying. But my question is, im thinking of running a similar set up, does the catted down pipe pass emissions? Would the catless? I applied to a job in Washington (Seattle) where they have emissions. I tried the forums in the Pac NW but got not response. Thanks in advance.

--Hops

 

WA does have emissions (sniffer) but not till the car is 5 years old. I am not sure if this applies to you since you would be transfering the title from hawaii to washington.

 

wow LA is so strict

 

Thanks man big help. I checked out their laws and should be alright for the 5 years. Alllllllright. Just gotta keep everything to switch back. YEAH. Do I have to switch back. Will a hi flow cat keep me legal, cause I want to get rid of the stupid pre-cat (Uppipe). Mahalos

 

does anyone know if i cut off the tips of the borla hush exhaust and weld on stocker looking tips, will this change the performance of the exhaust? i want the exhuast to look SUPER stock