Straight exhaust pipe on an inline 6 to much? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**67 twins** · 07-04-2019, 09:15 AM

Any of you inline 6 guys running straight exhaust (no muffler) to the rear bumper? I know a inline 6 sounds good like this, but is it TO loud. Or what else are you running that you are happy with?

RichardJ · 07-04-2019, 11:08 AM

>>I know a inline 6 sounds good like this,<<

Personally, I like a 6 cylinder, but I hate that raspy-ass sound. I have headers, an H-pipe, two mufflers in front of the axle and exit behind the rear tire.
The H-pipe crossover is curved to allow for the same stagger as the headers and is still at 90* entry to the pipes. The mufflers have the same stagger.
It is quieter that I really wanted, but doesn't have that raspy sound.

**HO455** · 07-05-2019, 03:07 PM

If you have no neighbors and don't mind being pulled over by the authorities occasionally, and don't mind having loss of hearing at an early age then it's fine, but otherwise not so much.

68BlueBeast · 07-06-2019, 02:13 PM

I did this on a competitor brand truck that I own. I liked it, it didn't seem unreasonably loud and to me sounded kind of like an old tractor rumbling down the road.

Greasey Harley · 07-06-2019, 04:16 PM

I've had a couple straight piped trucks. They sound neat.
Not too loud as long as the pipe is ran all the way back. They cackle when you let off the gas, it's fun ( if that's what you're into).
You could always add a mullfer later, if you decide you don't like the noise.
just my $.02
I ran my Shovelhead Harley with straight pipes, for 15 years, THAT WAS LOUD!!!

Quote:

Originally Posted by RichardJ

>>I know a inline 6 sounds good like this,<<

Personally, I like a 6 cylinder, but I hate that raspy-ass sound. I have headers, an H-pipe, two mufflers in front of the axle and exit behind the rear tire.
The H-pipe crossover is curved to allow for the same stagger as the headers and is still at 90* entry to the pipes. The mufflers have the same stagger.
It is quieter that I really wanted, but doesn't have that raspy sound.

That is one sweet I6 exhaust system

**67 twins** · 07-08-2019, 05:39 AM

Quote:

Originally Posted by HO455

If you have no neighbors and don't mind being pulled over by the authorities occasionally, and don't mind having loss of hearing at an early age then it's fine, but otherwise not so much.

So not being all that young I can always blame the loss of hearing on years of motorcycle riding, chainsaw use, or even my job. No need to blame it on one unmuffled truck. Lol
Seriously I don't think it could be louder than my wife's sbc truck with glass pack exhaust that ends shortly past the cab, since I plan to run it all the way out the back

Rambler62 · 07-08-2019, 06:54 AM

If you like the sound of the straight pipe but want it a little more on the quiet side look up Car Chemistry. I have them on two of my trucks and work great and a lot less money than a muffler.

**67 twins** · 07-08-2019, 11:50 AM

Quote:

Originally Posted by Rambler62

If you like the sound of the straight pipe but want it a little more on the quiet side look up Car Chemistry. I have them on two of my trucks and work great and a lot less money than a muffler.

Now this might be helpful. Thank you

07-04-2019, 09:15 AM	#1
67 twins Senior Member Join Date: Mar 2019 Location: Herculaneum MO (20 minutes south of St. Louis Posts: 649	Straight exhaust pipe on an inline 6 to much? Any of you inline 6 guys running straight exhaust (no muffler) to the rear bumper? I know a inline 6 sounds good like this, but is it TO loud. Or what else are you running that you are happy with? __________________ 67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris

07-04-2019, 11:08 AM	#2
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,470	Re: Straight exhaust pipe on an inline 6 to much? >>I know a inline 6 sounds good like this,<< Personally, I like a 6 cylinder, but I hate that raspy-ass sound. I have headers, an H-pipe, two mufflers in front of the axle and exit behind the rear tire. The H-pipe crossover is curved to allow for the same stagger as the headers and is still at 90* entry to the pipes. The mufflers have the same stagger. It is quieter that I really wanted, but doesn't have that raspy sound. Attached Images

07-05-2019, 03:07 PM	#3
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,393	Re: Straight exhaust pipe on an inline 6 to much? If you have no neighbors and don't mind being pulled over by the authorities occasionally, and don't mind having loss of hearing at an early age then it's fine, but otherwise not so much. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

07-06-2019, 02:13 PM	#4
68BlueBeast Registered User Join Date: Aug 2018 Location: MT Posts: 21	Re: Straight exhaust pipe on an inline 6 to much? I did this on a competitor brand truck that I own. I liked it, it didn't seem unreasonably loud and to me sounded kind of like an old tractor rumbling down the road.

07-08-2019, 06:54 AM	#7
Rambler62 Registered User Join Date: Apr 2017 Location: Freeport Fl Posts: 15	Re: Straight exhaust pipe on an inline 6 to much? If you like the sound of the straight pipe but want it a little more on the quiet side look up Car Chemistry. I have them on two of my trucks and work great and a lot less money than a muffler.



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