Exhaust Running Options/with 4/6 Drop?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevy_Man · 08-16-2005, 01:54 AM

What are the options on running exhaust with a 4/6 drop or any drop that allows you to exit out the rear of the truck? Would like to see any pics if possible....

Trying to figure out which drop to go with that will allow me to exit the exhaust out the rear or behind the tires on a coil spring truck. I have a 68 swb stepside. Was thinking about a 3/5 drop or a 4/6 drop...

eric

68C15 · 08-16-2005, 07:57 AM

a pic is worth a thousand words. here's 2K

lowrider79 · 08-16-2005, 10:09 PM

Quote:

Originally Posted by 68C15

a pic is worth a thousand words. here's 2K

I have a SB Stepside. This is the same method I used. The only difference is that I had to leave the mufflers under the truck in order to miss the step supports. I bent my own and mig welded the system. It's nice to see that someone else ran them the same way.

MandarinSixSeven · 08-17-2005, 10:52 AM

Quote:

Originally Posted by lowrider79

I have a SB Stepside. This is the same method I used. The only difference is that I had to leave the mufflers under the truck in order to miss the step supports. I bent my own and mig welded the system. It's nice to see that someone else ran them the same way.

Mine is the same way. The guy at our local (awesome) exhaust shop did it for me, he suggested it get run on the outside of the frame, I had never seen it like that, but it actually works really well.

P.S. - anyone in Kelowna wanting exhaust done, go to Tom at Precision.

DevinM · 08-16-2005, 09:42 PM

Here is what I'm doing. And, I finally got some $$$ together, so I purchased the Crossmember from ECE. Should be installed sometime during the 4th week of August.

http://67-72chevytrucks.com/vboard/s....php3?t=166129

powell72 · 08-17-2005, 01:00 AM

Here's how not to do it IMO-
"

"

shifty · 08-17-2005, 11:19 AM

Would it be possible to cut and reinforce a hole in the framerails for the exhaust to pass through if you wanted to lay frame in the future? I'm really wanting to keep my exhaust at the same level or higher than the frame on my truck.

*FormerMember* · 08-17-2005, 11:26 AM

I thought about running side pipes, ala the early 70's vette.

lowrider79 · 08-17-2005, 01:22 PM

Quote:

Originally Posted by grendel

I thought about running side pipes, ala the early 70's vette.

A friend of mine did that and it looks great. It also sounds good.

CHEVYE · 08-17-2005, 12:01 PM

Quote:

Originally Posted by shifty

Would it be possible to cut and reinforce a hole in the framerails for the exhaust to pass through if you wanted to lay frame in the future? I'm really wanting to keep my exhaust at the same level or higher than the frame on my truck.

you could run it through your rear xmember (where trail arms mount) and support it. they also sell them set up for it out of ECE and other places.

shifty · 08-17-2005, 01:08 PM

Right, but I'm literally talking about taking it through the framerail under the cab or before the tranny xmember. Get it to the outside of the frame that way, then pipe out in front of the wheels or carry it all the way back.

CHEVYE · 08-17-2005, 01:40 PM

Quote:

Originally Posted by shifty

Right, but I'm literally talking about taking it through the framerail under the cab or before the tranny xmember. Get it to the outside of the frame that way, then pipe out in front of the wheels or carry it all the way back.

ahhh.... i'm sure you could do it. people add step notches and stuff all of the time and hack the heck out of their frames

. i bet if you were to box the frame and plate it near where you want to do it. i don't see where you would run into trouble.

race-n-jason · 08-17-2005, 04:30 PM

Here's a write-up on my installation. My truck has a 3/5 drop. May not be exactly what your lookin' for. Thought I would add it to your list of options....

Note that I didn't run the pipes between the frame rails, and I still have plenty of ground clearance (IMO) for a cruiser.

http://67-72chevytrucks.com/vboard/s....php3?t=127448

72BLAZERDUDE · 08-17-2005, 06:55 PM

I have seen it done before. The guy took a short piece of 3 inch schedule 40 pipe and cut an eliptical hole ( so the exhaust runs through at an angle) and welded the pipe in at the correct angle. I think if you boxed the frame right there it would look pretty good

**GSFMECH** · 08-18-2005, 03:22 PM

Eric,

Here are some pics of mine as I promised you. I just got this system installed this past weekend. I have a big block with full length swap meet headers, I don't know who made them. They hang down pretty low but I have never drug them. The A-arms are as low as they are anyway. I did this "TXfirefighter style". I bought straight length's of 2 1/2" tubing from Summit along with Summit turbo's and Walker tailpipe spouts. I also used walker stainless clamps to connect the mufflers. I bought 45 degree elbows from JC Whitney that were expanded on one end, cut to fit and welded it all up. Everything is aluminized. It sounds good and has a nice rumble. I know a lot of guys like to run them on out but I like the pipes hidden. I think there is enough room to run them over the axle and on out from under the truck if I wanted to. I have a 4/6 drop and had them over the axle when I had my small block but only had 2" pipe then.
Mike

Chevy_Man · 08-17-2005, 01:09 PM

I have cut holes in the x- meber before on a lwb 72 , worked greatand went over the axle good, but also the truck was not lowered. The one i am building now is a swb step side and i am wanting to lower it. I was thinking of cutting the x-member again and and weld stiffener plates on the x-member. But here is the real thing with me wanting to lower it and move tank to rear that does not leave much room to clear the rear axle. I would like to have my exhaust dump out the rear of the truck or each corner of the fenders with just alittle bit of chrome tip showing, but i guess i am wanting to much and not enough rooom....lol. I was looking for ideas on how some of yall ran yours after the drop . Was thinking about a 4/6 drop or 3/5.... I have good ideas how but just wanted to see what everyone else did. When i do run mine i will take good detail pics so it maybe could get posted in faq....I know there wil be more wondering how or might be the best way and pics can save many many words....

eric

Chevy_Man · 08-18-2005, 03:32 PM

Hey Mike, that looks good not a bad job at all thanks for posting, that goes to show the guys you don't have to be a muffler man to run your on pipes and have a good clean set up at a low price. I thought about that too just till i can get the truck back together then see how much room i will have after i got the weight back on here and see how she sets and sounds.
eric

**Boog** · 08-18-2005, 08:53 PM

Anybody have an under side pic of a factory stock dual setup? Just how is it routed?
Reason I ask is I am considering buying some stock pipes for temporary runnin.

08-16-2005, 01:54 AM	#1
Chevy_Man Tightwad Join Date: Jun 2005 Location: Louisiana Posts: 408	Exhaust Running Options/with 4/6 Drop?? What are the options on running exhaust with a 4/6 drop or any drop that allows you to exit out the rear of the truck? Would like to see any pics if possible.... Trying to figure out which drop to go with that will allow me to exit the exhaust out the rear or behind the tires on a coil spring truck. I have a 68 swb stepside. Was thinking about a 3/5 drop or a 4/6 drop... eric

08-16-2005, 07:57 AM	#2
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	a pic is worth a thousand words. here's 2K Attached Images __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

08-16-2005, 09:42 PM	#5
DevinM Registered User Join Date: Jan 2002 Location: Deerfield, MA USA Posts: 198	Here is what I'm doing. And, I finally got some $$$ together, so I purchased the Crossmember from ECE. Should be installed sometime during the 4th week of August. http://67-72chevytrucks.com/vboard/s....php3?t=166129 __________________ '71 Chevy C-10 - Current '62 Imapla SS - Traded for my current '73 Nova Hatch - traded for ATC-350X '73 Chevelle Deluxe - First car (R.I.P) DEERFIELD, MA

08-17-2005, 01:00 AM	#6
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Here's how not to do it IMO- "" __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

08-17-2005, 11:19 AM	#7
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Would it be possible to cut and reinforce a hole in the framerails for the exhaust to pass through if you wanted to lay frame in the future? I'm really wanting to keep my exhaust at the same level or higher than the frame on my truck. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

08-17-2005, 11:26 AM	#8
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	I thought about running side pipes, ala the early 70's vette.

08-17-2005, 01:08 PM	#11
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Right, but I'm literally talking about taking it through the framerail under the cab or before the tranny xmember. Get it to the outside of the frame that way, then pipe out in front of the wheels or carry it all the way back. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

08-17-2005, 04:30 PM	#13
race-n-jason -Praise the Lowered- Join Date: Oct 2001 Location: Garland, Tx, USA Posts: 280	Here's a write-up on my installation. My truck has a 3/5 drop. May not be exactly what your lookin' for. Thought I would add it to your list of options.... Note that I didn't run the pipes between the frame rails, and I still have plenty of ground clearance (IMO) for a cruiser. http://67-72chevytrucks.com/vboard/s....php3?t=127448 __________________ Race-N-Jason ('71 Chevy C-10 LWB 454/TH350) ('07 Dodge Ram 2500, 5.9 Cummins/6-speed Manual)

08-17-2005, 06:55 PM	#14
72BLAZERDUDE Registered User Join Date: Jan 2002 Location: WATAUGA,TX Posts: 675	I have seen it done before. The guy took a short piece of 3 inch schedule 40 pipe and cut an eliptical hole ( so the exhaust runs through at an angle) and welded the pipe in at the correct angle. I think if you boxed the frame right there it would look pretty good __________________ 72 2wd 307/AT/AC/TILT WHEEL 78 JIMMY HIGH SIERRA

08-18-2005, 03:22 PM	#15
GSFMECH On the road Join Date: Jan 2004 Location: NATCHITOCHES LOUISIANA Posts: 818	Eric, Here are some pics of mine as I promised you. I just got this system installed this past weekend. I have a big block with full length swap meet headers, I don't know who made them. They hang down pretty low but I have never drug them. The A-arms are as low as they are anyway. I did this "TXfirefighter style". I bought straight length's of 2 1/2" tubing from Summit along with Summit turbo's and Walker tailpipe spouts. I also used walker stainless clamps to connect the mufflers. I bought 45 degree elbows from JC Whitney that were expanded on one end, cut to fit and welded it all up. Everything is aluminized. It sounds good and has a nice rumble. I know a lot of guys like to run them on out but I like the pipes hidden. I think there is enough room to run them over the axle and on out from under the truck if I wanted to. I have a 4/6 drop and had them over the axle when I had my small block but only had 2" pipe then. Mike Attached Images __________________ Mike Castro- 72 SWB. Ochre and White. 496/400 turbo, GV OD ,Dakota Digital dash , tilt, Vintage Air, PS, hydro boost, factory buckets, console, QA-1 Coil over suspension, 20/20"Billet Specialties Magnetos 72 SWB. Med blue. 454/400 turbo, tach, tilt, Stock AC, PS,PDB, factory buckets, console, ECE 4/6 drop w/ 2" blocks and C-notch, 20/20"Coys- Crashed and destroyed by drunk driver Sept 2019. New 72 build in the works. My new build thread "Castro" https://67-72chevytrucks.com/vboard/...d.php?t=820934 My old build thread, the blue truck http://67-72chevytrucks.com/vboard/s...d.php?t=271489 www.louisianaclassictruckclub.com

08-17-2005, 01:09 PM	#16
Chevy_Man Tightwad Join Date: Jun 2005 Location: Louisiana Posts: 408	I have cut holes in the x- meber before on a lwb 72 , worked greatand went over the axle good, but also the truck was not lowered. The one i am building now is a swb step side and i am wanting to lower it. I was thinking of cutting the x-member again and and weld stiffener plates on the x-member. But here is the real thing with me wanting to lower it and move tank to rear that does not leave much room to clear the rear axle. I would like to have my exhaust dump out the rear of the truck or each corner of the fenders with just alittle bit of chrome tip showing, but i guess i am wanting to much and not enough rooom....lol. I was looking for ideas on how some of yall ran yours after the drop . Was thinking about a 4/6 drop or 3/5.... I have good ideas how but just wanted to see what everyone else did. When i do run mine i will take good detail pics so it maybe could get posted in faq....I know there wil be more wondering how or might be the best way and pics can save many many words.... eric Last edited by Chevy_Man; 08-17-2005 at 01:11 PM.

08-18-2005, 03:32 PM	#17
Chevy_Man Tightwad Join Date: Jun 2005 Location: Louisiana Posts: 408	Hey Mike, that looks good not a bad job at all thanks for posting, that goes to show the guys you don't have to be a muffler man to run your on pipes and have a good clean set up at a low price. I thought about that too just till i can get the truck back together then see how much room i will have after i got the weight back on here and see how she sets and sounds. eric

08-18-2005, 08:53 PM	#18
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,452	Anybody have an under side pic of a factory stock dual setup? Just how is it routed? Reason I ask is I am considering buying some stock pipes for temporary runnin. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross



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