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Old 05-29-2018, 04:49 PM   #26
RJEJUSA
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Quote:
Originally Posted by Hagbeard View Post
^^^ Nice!

While you guys are on the subject I'm looking for a direct answer..

For 2018 WRX STI is there a list of CARB/SMOG legal mods?
I realize it's a long way before smog check but rather no go through changing parts all the time. Plus looking for moderate power gain..
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Old 06-04-2018, 07:14 PM   #27
Hagbeard
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Catbacks, AOS, and intercoolers don't require EOs so those are legal (noise restrictions on the catback is a separate issue). Parts that have gone through the CARB evaluation and have been granted an exemption are legal. Parts that have an exemption and will give you a moderate power gain are generally exclusive of each other. You can search for EOs on parts here. The whole thing is moot since you'd need a tune (illegal) to see the power gains.

The real question is, what mods can you make, get some power, and still pass smog without swapping parts? Quite a bit, actually.
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Old 06-10-2018, 01:53 PM   #28
subaru_gc8
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Quote:
Originally Posted by RJEJUSA View Post
While you guys are on the subject I'm looking for a direct answer..

For 2018 WRX STI is there a list of CARB/SMOG legal mods?
I realize it's a long way before smog check but rather no go through changing parts all the time. Plus looking for moderate power gain..
I think they uped it to 8 years on new cars before you have to get a smog check. most bang for your buck is going to be a cobb intake with a access port. Any down pipe will be illegal. so stage 1 is about as far as you can go
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Old 03-01-2019, 01:00 PM   #29
Blaknite
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Anybody know a smog place? Pm me. I just moved to SoCal recently. I’ll compensate for your referral. Thanks!
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Old 03-26-2019, 05:50 PM   #30
Spinningharmony
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Iíve gotten lucky over the years until now avoiding STAR smog. Iím running an Invidia catted DP + CARB intake with a stage 2 tune. I was told by someone that if I flash the stock map and drive some miles I should be fine with the catted DP. Iíve also read that anything other than a stock DP is an auto fail.

Any opinions? And DMs are always welcome for SoCal smog places lol
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Old 03-27-2019, 12:18 AM   #31
NutBucket
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Depends on the guy testing but yes, anything other than stock is a fail. I thought SPT was the only CARB approved intake but I could be wrong.

The test is computer only now and so far a Cobb map isn't a problem even with disabled CELs.
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Old 05-16-2019, 03:16 PM   #32
subaru_gc8
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Quote:
Originally Posted by Spinningharmony View Post
Iíve gotten lucky over the years until now avoiding STAR smog. Iím running an Invidia catted DP + CARB intake with a stage 2 tune. I was told by someone that if I flash the stock map and drive some miles I should be fine with the catted DP. Iíve also read that anything other than a stock DP is an auto fail.

Any opinions? And DMs are always welcome for SoCal smog places lol
I would put the stock dp back on. if it is aftermarket there is apposed to be a carb number on the replaced cat and they have to input that info into the computer
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