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Cheap 3.5" exhaust

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Old 03-22-2019, 11:27 AM
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dumb question.. is the stock y pipe 3” where it bolts to remainder of exhaust?
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Old 03-22-2019, 12:19 PM
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Originally Posted by hunterbohanan23
dumb question.. is the stock y pipe 3” where it bolts to remainder of exhaust?

Yes on the 5.3 it is. On the 6.2 it's 3.5"

I wrote that in a post above too if you want to glance over that post. Post #18 in this thread
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Old 03-22-2019, 12:21 PM
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gotcha! just trying to find a temporary adapter for the stock pipe for this 3.5” exhaust. it’ll be a month or two before i upgrade to long tubes and y pipe! i see summit makes an adapter as well i might try
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Old 03-22-2019, 04:10 PM
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Originally Posted by hunterbohanan23
gotcha! just trying to find a temporary adapter for the stock pipe for this 3.5” exhaust. it’ll be a month or two before i upgrade to long tubes and y pipe! i see summit makes an adapter as well i might try
Have a link to the adapter? I can't see how you could do anything without cutting the pipe and putting a transition in there.
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Old 03-24-2019, 08:16 PM
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alright.. picked up a factory 6.2 exhaust today. bug hit me good because i’m ordering speed engineering long tubes and y pipe tomorrow.. going full exhaust, with a Borla XR1 3.5”, mostly because they don’t make a Pro XS in 3.5”. going with a sportmans I think. but the bigger size of XR1 regardless then the resonator to keep it quiet.
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Old 03-24-2019, 08:19 PM
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Originally Posted by 00pooterSS
Have a link to the adapter? I can't see how you could do anything without cutting the pipe and putting a transition in there.

i totally forgot the 6.2 exhaust has a ball joint connection and i was looking at simple 3” to 3.5” connectors
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Old 03-24-2019, 08:52 PM
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Originally Posted by hunterbohanan23
alright.. picked up a factory 6.2 exhaust today. bug hit me good because i’m ordering speed engineering long tubes and y pipe tomorrow.. going full exhaust, with a Borla XR1 3.5”, mostly because they don’t make a Pro XS in 3.5”. going with a sportmans I think. but the bigger size of XR1 regardless then the resonator to keep it quiet.
Exact setup I'm doing but I'm adding a high flow cat to help with emissions since they test here. Going to have to get creative with the rear O2's but I'll figure it out.
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Old 03-24-2019, 08:57 PM
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I’m here in OKC so no worries.. maybe weld in the factories and run sensors? i doubt the “high flows” flow any better unless i’m mistaken.. bastards are expensive too
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Old 03-24-2019, 09:03 PM
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My magnaflow hfc was like $50. I'm probably going to weld in two bungs behind it and tie the rear O2's in there. That way they can still be active when they do the OBD2 test.
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Old 03-24-2019, 10:15 PM
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Originally Posted by Bgbldodge
Exact setup I'm doing but I'm adding a high flow cat to help with emissions since they test here. Going to have to get creative with the rear O2's but I'll figure it out.
I'm in Texas too and I've passed emissions without cats on cars for about 20 years. Super easy with GM cars, just get the tuner to tune out the rear 02's and codes and the inspection machine doesn't know the difference. Just passed a couple of months ago with my 14 truck.

I do NOT have cats OR rear 02 sensors. My rear 02 sensors are on the shelf and the wiring harnesses are just there (on the truck) with nothing plugged in. Same with my Camaro.
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