Tbss intake question
TECH Senior Member
Joined: Jun 2016
Posts: 22,301
Likes: 3,625
From: Central Cal.
Thread Starter
Teching In
Joined: Apr 2021
Posts: 15
Likes: 2
my 02 sierra 2500 has it kinda wanted to keep it smog legal but I think some came without so I might be able to get away with removing it
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TECH Senior Member
Joined: Jun 2016
Posts: 22,301
Likes: 3,625
From: Central Cal.
What sort of emission testing is done in your state (which one?).
If they sniff, you might have a problem. A 427 will test way different than the old LQ4.
If it's visual, just keep the outside stock, and use a smooth cam.
If, like here in California, they hookup to your OBDII port, just make sure there are no codes showing. We also do visual besides the OBDII scan.
If they sniff, you might have a problem. A 427 will test way different than the old LQ4.
If it's visual, just keep the outside stock, and use a smooth cam.
If, like here in California, they hookup to your OBDII port, just make sure there are no codes showing. We also do visual besides the OBDII scan.
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Thread Starter
Teching In
Joined: Apr 2021
Posts: 15
Likes: 2
What sort of emission testing is done in your state (which one?).
If they sniff, you might have a problem. A 427 will test way different than the old LQ4.
If it's visual, just keep the outside stock, and use a smooth cam.
If, like here in California, they hookup to your OBDII port, just make sure there are no codes showing. We also do visual besides the OBDII scan.
If they sniff, you might have a problem. A 427 will test way different than the old LQ4.
If it's visual, just keep the outside stock, and use a smooth cam.
If, like here in California, they hookup to your OBDII port, just make sure there are no codes showing. We also do visual besides the OBDII scan.