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

Project82 · 01-04-2009, 02:29 AM

Hey everyone...couple questions...

I'm looking to put a nice throaty exhaust on my 82 longbed...im thinking about going with long tube hedman headers...3" pipe...out to two flowmaster 40 series mufflers...exiting before the rear tires...

Anybody have some good expeirences with 3" piping or 2.5"? Will their really be a difference in torque output? How about a crossover pipe, like an H-pipe or would true duals be the better choice?

I'm curious because i dont wanna spend bookoos of money on an exhaust i wont like...

If anyone has any videos of different types of exhaust...i would greatly appreciate it.

Thanks in advance
Kris

66truckin · 01-04-2009, 03:03 AM

flowmaster 40 series will drone you to death especially dumping before the rear axle. I wouldn't do it if its your daily driver. 2 1/2" and 3" pipes are way too big for a 305. Looks like you are building a 383? I would go 2 1/2" thats what I always run with mild built 350's on up to 454's. I don't have any experience with h pipes sorry.

Ds86C10 · 01-04-2009, 03:58 AM

youtube chevy exhaust... there is a bunch of different set ups in videos there. oh and 3 inch exhaust... is not to big, all the 4.6 fords ive seen that get exhaust get 3 inch... and you should run a X pipe or a H pipe other wise kiss your torque good bye

Project82 · 01-05-2009, 07:53 PM

Thanks guys for your input...they're really helping me decide...

loud is what i like. right now i dont even have a muffler on it...i like the hum of the motor doin about 45-50...so to be honest i dont really want a quiet exhaust...

the 383 im building...wont necessarily be mild..."big" cam, "big" heads, matching intake...blah blah blah...

lets just say when i mash the pedal, i wanna scare the sh*t out of the car next to me like the way my dads big block did when he had it in his 69

Thanks again guys.

softballnrd27 · 01-05-2009, 10:43 PM

Here is a video of mine.
Stock 350, headers 2.5" Super 44 flows with turndowns straight off the muffler:

Video of Flowmasters and headers - Photobucket -...

Albatrossian · 01-06-2009, 12:07 AM

An x-pipe is the way to go for torque. I love the sound of Flows, but the 40s just give me a headache after 40 miles.. 50s are nice though.

01-04-2009, 02:29 AM	#1
Project82 Bretzke Racing Inc. Join Date: Jun 2008 Location: Houston, Texas Posts: 114	Exhaust Questions... Hey everyone...couple questions... I'm looking to put a nice throaty exhaust on my 82 longbed...im thinking about going with long tube hedman headers...3" pipe...out to two flowmaster 40 series mufflers...exiting before the rear tires... Anybody have some good expeirences with 3" piping or 2.5"? Will their really be a difference in torque output? How about a crossover pipe, like an H-pipe or would true duals be the better choice? I'm curious because i dont wanna spend bookoos of money on an exhaust i wont like... If anyone has any videos of different types of exhaust...i would greatly appreciate it. Thanks in advance Kris __________________ 1982 Chevy Silverado C-10 RCLWB - IN PAINT - Inferno Orange Metallic Lowered 4.5/6 - 358 SBC 10.5:1, Comp XE268H cam, Aluminum heads, 650 Double pumper Holley carb, 2400 Holeshot Converter, upgraded T/h350 Trans. Stock Rear end for now (3.08 gear) 2004 Chevy Silverado 1500 LS RCSWB - Dark Spiral Gray Metallic Lowered 2/4 - 4.8L V8 4L60E 10-bolt. some goodies --- NEW DD 11/9/12 "Expect the Un-expected" "Gas, Grass, Or Ass...No one rides for FREE!"

01-04-2009, 03:03 AM	#2
66truckin Registered User Join Date: Jan 2009 Location: Springfield, IL Posts: 185	Re: Exhaust Questions... flowmaster 40 series will drone you to death especially dumping before the rear axle. I wouldn't do it if its your daily driver. 2 1/2" and 3" pipes are way too big for a 305. Looks like you are building a 383? I would go 2 1/2" thats what I always run with mild built 350's on up to 454's. I don't have any experience with h pipes sorry.

01-04-2009, 03:58 AM	#3
Ds86C10 2WD 4 Life Join Date: Oct 2008 Location: Coon Rapids, MN Posts: 169	Re: Exhaust Questions... youtube chevy exhaust... there is a bunch of different set ups in videos there. oh and 3 inch exhaust... is not to big, all the 4.6 fords ive seen that get exhaust get 3 inch... and you should run a X pipe or a H pipe other wise kiss your torque good bye __________________ Big D 1969 c10 1960 cadillac 1978 king cobra

01-05-2009, 07:53 PM	#4
Project82 Bretzke Racing Inc. Join Date: Jun 2008 Location: Houston, Texas Posts: 114	Re: Exhaust Questions... Thanks guys for your input...they're really helping me decide... loud is what i like. right now i dont even have a muffler on it...i like the hum of the motor doin about 45-50...so to be honest i dont really want a quiet exhaust... the 383 im building...wont necessarily be mild..."big" cam, "big" heads, matching intake...blah blah blah... lets just say when i mash the pedal, i wanna scare the sht out of the car next to me like the way my dads big block did when he had it in his 69 Thanks again guys. __________________ 1982 Chevy Silverado C-10 RCLWB - IN PAINT - Inferno Orange Metallic* Lowered 4.5/6 - 358 SBC 10.5:1, Comp XE268H cam, Aluminum heads, 650 Double pumper Holley carb, 2400 Holeshot Converter, upgraded T/h350 Trans. Stock Rear end for now (3.08 gear) 2004 Chevy Silverado 1500 LS RCSWB - Dark Spiral Gray Metallic Lowered 2/4 - 4.8L V8 4L60E 10-bolt. some goodies --- NEW DD 11/9/12 "Expect the Un-expected" "Gas, Grass, Or Ass...No one rides for FREE!"

01-06-2009, 12:07 AM	#6
Albatrossian Georgia Boy Join Date: Jun 2008 Location: Douglas, Georgia Posts: 370	Re: Exhaust Questions... An x-pipe is the way to go for torque. I love the sound of Flows, but the 40s just give me a headache after 40 miles.. 50s are nice though. __________________ 81 GMC High Sierra, 2WD, 357ci/700R4, 3.73s, posi.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.