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Old 11-12-2003, 08:03 PM   #1
SilveRexy03
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Default HKS downpipe and uppipe

I'm about to install both of these on my car and my car will be completely catless, does anyone have this combo or running their wrx with all 3 cats off? i would like to know the negs and positives of running w/o all 3. thanks.
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Old 11-12-2003, 10:02 PM   #2
Parallax
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You're gonna get a CEL.
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Old 11-13-2003, 03:01 PM   #3
SilveRexy03
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right, i have the CEL fix and the other part for the uppipe
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Old 11-13-2003, 03:56 PM   #4
wrxruIes
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have you thought about thermal wraping your up and down pipe thats what i did, and like everyone says heat is your enemy.
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Old 11-20-2003, 10:56 PM   #5
MOTO-REX
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SILVERREXY i have a hks downpipe and ur gonna definitely need a CEL fix. but it definitly adds power
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Old 11-21-2003, 01:10 PM   #6
SilveRexy03
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i just got both parts installed and my car feels great, no CEL's!!!
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Old 11-21-2003, 05:17 PM   #7
Jeremy H
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Quote:
Originally posted by SiLvErReXy03
i just got both parts installed and my car feels great, no CEL's!!!
What CEL fix did you use?
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Old 12-02-2003, 12:33 AM   #8
SpoonTypeR
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is it loud?

coz i only have HKS Hi POwer Cat back now.

it's a bit quiet.

but if i install HKS up and down pipe will it be louder?thanx
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Old 12-02-2003, 10:26 PM   #9
lawn boy
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it will be louder, but not that loud. i dont even think my catless dp/blitz nur spec is THAT loud.
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Old 12-11-2003, 12:06 AM   #10
WReX'n'Effect
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is there crap building up on your rear bumper? It usually happens when you go catless.
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Old 12-11-2003, 01:00 PM   #11
Parallax
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I have HKS up-pipe, downpipe and Hi-power and it's pretty loud but not too loud, it sounds great
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Old 12-11-2003, 01:13 PM   #12
SilveRexy03
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yeah i think i noticed crap on my rear bumper from that
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Old 12-28-2003, 03:58 AM   #13
Azjon
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Quote:
Originally posted by Jeremy H
What CEL fix did you use?
I got an HKS up + dp. I got the cel fix from Gruppe-S. I think it was a Helix cel fix.
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Old 12-30-2003, 01:42 AM   #14
Silver WRX 420
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I also use both with the Carbon Titanium catback...with stock motor and ECU there was a CEL, but with the JDM Sti motor and JDM ECU there is no CEL...It is loud as hell...but in a good way
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