09 GT OEM exhaust tip size? - Pontiac G8 Forum: G8 Forums - G8Board.com
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

 
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post #1 of 5 (permalink) Old 02-02-2017, 05:55 PM Thread Starter
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09 GT OEM exhaust tip size?

looking to replace the factory dual tips but do not know what can fit to replace them? I saw someone had some 4 inch dual borla tips but what size inlet would i need?
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post #2 of 5 (permalink) Old 02-02-2017, 06:53 PM
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The single pipe exiting the muffler on my GT reads 2.250" OD. From there, a Y pipe section that's welded on that pipe grows to approx a 2.400 OD (as best as I can read with a caliper). From there, the 2 tips are welded on to that Y pipe section. Don't know if this will help with your game plan.
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post #3 of 5 (permalink) Old 02-02-2017, 07:20 PM Thread Starter
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Originally Posted by GOPHERIT View Post
The single pipe exiting the muffler on my GT reads 2.250" OD. From there, a Y pipe section that's welded on that pipe grows to approx a 2.400 OD (as best as I can read with a caliper). From there, the 2 tips are welded on to that Y pipe section. Don't know if this will help with your game plan.
ok thanks, im sure some 2 1/2 inch OD would work
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post #4 of 5 (permalink) Old 02-03-2017, 07:45 AM
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Originally Posted by ThickRicc View Post
ok thanks, im sure some 2 1/2 inch OD would work

They would work fine and is what most consider stock size on the GT. The GXP came with 3" tips. The opening on the GXP diffuser is also slightly larger.

Last edited by Strykerblue09GT; 02-03-2017 at 08:36 AM.
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post #5 of 5 (permalink) Old 02-03-2017, 01:51 PM Thread Starter
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Originally Posted by Strykerblue09GT View Post
They would work fine and is what most consider stock size on the GT. The GXP came with 3" tips. The opening on the GXP diffuser is also slightly larger.

ok. ive got a gxp diffuser and thinking about 4 inch tips but do tips this big look OK or do they look goofy? i havent seen any in person on a G8.
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