I am trying to decide if the gains are worth the money if I get a cat-back exhaust, (looking at the HKS) and a boost controller. Will the gains be noticable? how much more hp would I gain from this? Also what would be the proper setting for boost?? THANKS

 

yes get it and a flash....... completely different car

 

20 psi or just get a dynoflash w/ boost control

 

can mitsubishi detect a dynoflash?? I was thinking of getting a boost controller instead so I can unbolt it if I need warrentee work.

 

Supposedly not on the 03 and 04 models .... but rumors are that the 05 is detectable ...

 

A cat-back will be worth the money if you DON'T get HKS, but rather a much cheaper unit that gives the same HP gains along with great fitment.

An MBC is a great mod regardless of vendor, but be ABSOLUTELY SURE you get a boost gauge at the same time. Do not install the MBC without a boost gauge.

You can expect 15-20whp from the cat-back and maybe another 20whp from the MBC. The thing with the MBC is it doesn't just give you a peak boost increase, but it also removes some of the factory boost taper on the top end, so you gain significant HP across the entire powerband.

 

A nice difference. Catback, with intake and boost controller, and tune. Atleast 30whp.

 

trust me, its still a big gain on the 03,04 models. I got 30whp gain with a catback, intake, and tune, no boost controller. Car was tuned by Al.

 

You don't even need a catback, just get and axelback exhaust (muffler or muffler delete pipe). They run $125-200 dollars.

There are 3 "major" restrictions in the stock exhaust:
1) Turbo housing
2) Catalytic Converter
3) Muffler

 

hks cat back is bad?? What is a perfect fitting straight cat-back?? The helix seemed cheap and very straight....

 

I have Turbo XS. Fits like a glove. Sounds sick. $588.00 on lancershop.com

 

i went with this one...https://www.evolutionm.net/forums/sh...d.php?t=150314 i got the turbo back tho...still cheaper than a lot of catbacks on the market

 

its kinda hard to screw up simple piping. but i guess if you are into lables spend the extra cash...

 

buschur racing full turbo back exhaust. the HKS is just not worth the money. I had the apexi N1 on my gsx cause it was pretty much (except at the o2 housing) 3" but the N1 for the evo is like 2.5". The HKS will be the same or less efficent as the BR one and cost more.

 

The flash should be the least of you worries when going to
for warranty