Exhaust size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72BLAZERDUDE · 07-29-2003, 09:16 AM

I am getting ready to do my exhaust and was wondering if I should go to 2 1/2 inch exhaust. I am still running my stock 307 but going to go with headers and stainless. At some point in the near future I will be going to put in my 383 but it is not quite ready yet. I dont need to go any bigger than that do I ? Will I notice any difference with my 307 ( to big a diameter) Is it worth it to go with all stainless exhaust. Lots of questions just not sure. Might just break down and have everything aluminized and should not have to ever do it again. Let me know what you think and what you are running.

Blue4x4 · 08-20-2003, 01:38 AM

I had 2 1/2 exhaust on my 383. sounds really nice. Went back and had the crossover pipe in. WOW.....

krazy_texan · 08-20-2003, 10:55 AM

i have 3inch stainless running off of my 350 and i love it but that might be a little to big for you, not to mention i have 12 inch glass packs

gr8scott51 · 08-20-2003, 05:49 PM

If you are going to keep the 307 for any length of time, no larger than 2-1/4" to the muffler. You can change that section when you get your 383 installed. Good luck, Scott

fast67chevy2002 · 08-21-2003, 04:49 PM

I am running 2 1/2" w/ 18" glasspacks and it sound good. I'm running it w/ a 350

07-29-2003, 09:16 AM	#1
72BLAZERDUDE Registered User Join Date: Jan 2002 Location: WATAUGA,TX Posts: 675	Exhaust size I am getting ready to do my exhaust and was wondering if I should go to 2 1/2 inch exhaust. I am still running my stock 307 but going to go with headers and stainless. At some point in the near future I will be going to put in my 383 but it is not quite ready yet. I dont need to go any bigger than that do I ? Will I notice any difference with my 307 ( to big a diameter) Is it worth it to go with all stainless exhaust. Lots of questions just not sure. Might just break down and have everything aluminized and should not have to ever do it again. Let me know what you think and what you are running. __________________ 72 2wd 307/AT/AC/TILT WHEEL 78 JIMMY HIGH SIERRA

08-20-2003, 10:55 AM	#3
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	i have 3inch stainless running off of my 350 and i love it but that might be a little to big for you, not to mention i have 12 inch glass packs __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

08-20-2003, 05:49 PM	#4
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	2-1/4" If you are going to keep the 307 for any length of time, no larger than 2-1/4" to the muffler. You can change that section when you get your 383 installed. Good luck, Scott __________________ Silence is golden, duct tape is silver. - Scott

08-20-2003, 01:38 AM	#2
Blue4x4 Senior Member Join Date: Mar 2003 Location: Sparks, NV Posts: 790	I had 2 1/2 exhaust on my 383. sounds really nice. Went back and had the crossover pipe in. WOW.....

08-21-2003, 04:49 PM	#5
fast67chevy2002 Dad's little helper Join Date: Apr 2003 Location: Helena, MT Posts: 194	I am running 2 1/2" w/ 18" glasspacks and it sound good. I'm running it w/ a 350



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