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This is a discussion on stock exhaust size within the Exhaust forums, part of the Performance category; Just seeing if anyone knows the stock exhaust size on a NBS of the top of their head, its a ...
Just seeing if anyone knows the stock exhaust size on a NBS of the top of their head, its a little late to go out and measure mine.
bump...i have tried to search on here and still no luck..
The y-pipe is 2.5 and after the cat/muffler joint, it becomes a 3 inch diameter as it goes into the muffler. I believe after the muffler it gets reduced back to the 2.5 inch size. I am not 100% on the after muffler size, but the other parts I am certain of.
00 RCSB Z71/JBA cat-back/Z71 Tahoe valance/EBC slotted&drilled rotors with SS lines & SS braided hoses/Edelbrock headers/BB tune/6000k HID low beam & fog lamps/Auto-headlight disable mod(nice)/Vette servo/LT1 E-fans/LED gauge cluster/Titan 18" wheels/Rollpan/Belltech rear sway bar/2-4 drop
the stock pipe on my 04 is 2.75 in/out of the the muffler.
98 stepside:hp 44,14bolt, 5.13's, 39.5" rockers on 15x12 bart wheels, doug thorely tri-y's,
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