K20 Exhaust over the transfer case crossmember? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OldChevy1954 · 09-01-2017, 11:50 PM

Hey all, has anybody run 2.5" exhaust between the frame rail and the transfer case, up high not under it? I'm wanting to run mandrel bends before and after a straight piece of pipe that goes right through that opening beside the transfer case. Can it be done? Any pictures out there?

Thanks.

72Cheyenne454 · 09-02-2017, 12:09 AM

No problem. I've done 2.5" and 3" pipe. The 3" needed to be flattened slightly to clear the T-Case.

Here's a few pics of the 2.5" system.

Miles

OldChevy1954 · 09-02-2017, 12:17 AM

Thanks! Great pictures. It's the passenger side that's tricky. Are those 45 degree angles coming down from the top?

Thanks

**57taskforce** · 09-02-2017, 12:48 AM

Damn its beautiful under their!! My exhaust runs over the crossmember as well but pictures are far inferior to those posted above

B. W. · 09-02-2017, 11:01 AM

57Taskforce beat me to it - I was going to post but after seeing your exhaust I'm ashamed!

**jerry moss** · 09-02-2017, 10:15 PM

i've been doing exhaust 32+ years at the same shop and i always go over the crossmember on our trucks. those pics above are exactly how i build them except for the crossover pipe, i build mine a little different.

**special-K** · 09-03-2017, 05:49 AM

Yep, up and over is the only way to go. And I have a picture somewhere too, but not going to bother to find that ugly thing now

.

72Cheyenne454 · 09-03-2017, 09:47 AM

Quote:

Originally Posted by OldChevy1954

Thanks! Great pictures. It's the passenger side that's tricky. Are those 45 degree angles coming down from the top?

Thanks

Sorry, I don't know what the angles are.

Miles

**special-K** · 09-03-2017, 01:43 PM

I had a couple sets of 5' pipe made to come off of full length headers with the bells welded up front, run back I'm guessing 12-16", 45 up/45 down made up so I could drive my trucks to get exhaust. They can be rotated as needed to clear the right side. Once at the shop the exhaust man can cut, bend, whatever he needs beyond the transfer case, and finish them out how I've requested. I have a picture of the bends somewhere on P-bucket I can look for

09-01-2017, 11:50 PM	#1
OldChevy1954 Registered User Join Date: May 2016 Location: Salisbury, MD Posts: 58	K20 Exhaust over the transfer case crossmember? Hey all, has anybody run 2.5" exhaust between the frame rail and the transfer case, up high not under it? I'm wanting to run mandrel bends before and after a straight piece of pipe that goes right through that opening beside the transfer case. Can it be done? Any pictures out there? Thanks.

09-02-2017, 12:09 AM	#2
72Cheyenne454 Registered User Join Date: Apr 2007 Location: San Diego Posts: 457	Re: K20 Exhaust over the transfer case crossmember? No problem. I've done 2.5" and 3" pipe. The 3" needed to be flattened slightly to clear the T-Case. Here's a few pics of the 2.5" system. Miles Attached Images

09-02-2017, 12:17 AM	#3
OldChevy1954 Registered User Join Date: May 2016 Location: Salisbury, MD Posts: 58	Re: K20 Exhaust over the transfer case crossmember? Thanks! Great pictures. It's the passenger side that's tricky. Are those 45 degree angles coming down from the top? Thanks

09-02-2017, 12:48 AM	#4
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,518	Re: K20 Exhaust over the transfer case crossmember? Damn its beautiful under their!! My exhaust runs over the crossmember as well but pictures are far inferior to those posted above __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

09-02-2017, 11:01 AM	#5
B. W. Registered User Join Date: Nov 2014 Location: Bigfork, Montana Posts: 1,137	Re: K20 Exhaust over the transfer case crossmember? 57Taskforce beat me to it - I was going to post but after seeing your exhaust I'm ashamed!

09-02-2017, 10:15 PM	#6
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,949	Re: K20 Exhaust over the transfer case crossmember? i've been doing exhaust 32+ years at the same shop and i always go over the crossmember on our trucks. those pics above are exactly how i build them except for the crossover pipe, i build mine a little different. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

09-03-2017, 05:49 AM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: K20 Exhaust over the transfer case crossmember? Yep, up and over is the only way to go. And I have a picture somewhere too, but not going to bother to find that ugly thing now . __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

09-03-2017, 01:43 PM	#9
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: K20 Exhaust over the transfer case crossmember? I had a couple sets of 5' pipe made to come off of full length headers with the bells welded up front, run back I'm guessing 12-16", 45 up/45 down made up so I could drive my trucks to get exhaust. They can be rotated as needed to clear the right side. Once at the shop the exhaust man can cut, bend, whatever he needs beyond the transfer case, and finish them out how I've requested. I have a picture of the bends somewhere on P-bucket I can look for __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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