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

**Ironhorse** · 07-20-2002, 09:26 PM

In the near future ( hopefully two week time period) plan on replacing old single exhaust with new duals exiting out behind the rear tires at an angle. What do the exhaust experts think of a 2" welded system using turbo pack mufflers? Is it better to run complete and seperate duals or is it a good thing to have an H pipe run connecting the two sides? Not building a street runner here, bear in mind this is a 4x4 with a 350/ 2 bbl and a granny four speed. Have under bed tank in rear of truck and am using the stock cast iron rams horn exhaust headers with straight down dumps. Plan on staying with them, makes changing plugs so much easier and they seal up tight. Have an exhaust shop quoting me a total price of $160 which I thought was pretty reasonable. Thanks to all who answer with tips and in-put>

Longhorn Man · 07-20-2002, 09:55 PM

$160 is d@mn good.
As for a stock 350, 2 inch pipes is plenty. An H pipe is a good idea no matter what, but can make tranny removal a real PITA. You could ask to make the H-pipe removable, and to have the pipes wide enough to drop the tranny out without removing the exhaust.

72Lester · 07-20-2002, 10:54 PM

Good price and go with an H pipe

Low69CST · 07-20-2002, 11:13 PM

sounds like a good deal. an H pipe will give you alittle extra power ( you probably won't notice it) and a different sound.

oleblue72 · 07-21-2002, 01:43 AM

Mine exit out behind rear tires at an angle.No H-pipe. I been very pleased with sound, performance, etc. on my mild ole 350.

**JIMs70GMC** · 07-21-2002, 03:18 AM

That's what I did with mine, except I used chambered mufflers(Summit). They were a little more than the turbo's, quieter in the cab, but screams like a bat out of hell when you put your foot on the gas. I paid $170 for 2.5" pipe, from my vette ramhorns, exiting at an angle behind the rear tires.

crazy longhorn · 07-21-2002, 11:31 AM

Thats a good deal,I would also reccomend an H pipe. The h pipe will "mellow" the exhaust note a bit,& give more performance in the low to midrange(also said to help milage), but I cant say on that one.......I usually have "five toes in the carb"! As longhorn mail has posted,I would also have the H pipe set up as removeable.......it shouldnt be too much more . Good luck......Al

*racedvl* · 07-21-2002, 11:51 AM

My exhaust is glasspacks that dump out in front of the tire. 2 1/4 " exhaust. I would like to run it over the rear axle, because of all the noise in the cab. But my exhaust does sound nice.

**Smitty** · 07-21-2002, 12:36 PM

Won't say how much I just spent on mine. But am running stock manifolds and had 2 1/4" from there to 3 chambered Flowmasters to 3" which exit out behind the rear wheel wells (to the side). I wanted to consider trans work in the future. Instead of the H pipe or equalizer the muffler shop brought them together behind the trans crossmember and siamesed them. Good sound and gave me a boost on the top end. Also they put flanges on the pipe just ahead of the mufflers which are stuffed up under the bed so I can remove them if I need to drop the trans. The 3" tailpipes were overkill I now realize that 2 1/2" probably would have been enough. But all in all I am satisfied.

barn9 · 07-21-2002, 03:08 PM

I sure believe in using the H pipe. Did you listen to mine the day we met? I can't remember if I ever had it running while you were there. I wouldn't put duals on without an H pipe myself.

**Ironhorse** · 07-21-2002, 10:06 PM

Thanks guys for all your input and ideas. Sounds as if I need to check into putting the H pipe in the system. I like the idea of having it removeable if needed at some future point.

barn9, never did get to hear your truck at the Winfield show. Wish I had talked to you about the exhaust question then but then can't cover everything at one time. Had a good time at that show with you, Yukon Jack and Blazerboy. Look forward to our next meeting. Plan on having my truck at that meeting when ever that happens. As an a-side, got all the lights working, cig. lighter with the little bulb also, new dash bezel looks good with all new bulbs. Nice and bright. Got the tach wired in today and it works! Only thing left to put in is the sound system, floor padding and rubber mat and the seat belts. Then it is off to get the bed spray done and the exhaust.

07-20-2002, 09:26 PM	#1
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,285	Exhaust Question ? In the near future ( hopefully two week time period) plan on replacing old single exhaust with new duals exiting out behind the rear tires at an angle. What do the exhaust experts think of a 2" welded system using turbo pack mufflers? Is it better to run complete and seperate duals or is it a good thing to have an H pipe run connecting the two sides? Not building a street runner here, bear in mind this is a 4x4 with a 350/ 2 bbl and a granny four speed. Have under bed tank in rear of truck and am using the stock cast iron rams horn exhaust headers with straight down dumps. Plan on staying with them, makes changing plugs so much easier and they seal up tight. Have an exhaust shop quoting me a total price of $160 which I thought was pretty reasonable. Thanks to all who answer with tips and in-put> __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

07-20-2002, 10:54 PM	#3
72Lester Genuine smartass Join Date: Jun 2002 Location: Enid, OK - soon to be Rapid City, SD Posts: 126	Good price and go with an H pipe __________________ '99 Chevy 3/4 Burb 4x4 '98 Chevy 1/2 Short Bed 4x4 Former 67 & 72 owner Wanted: 1972 10 or 20 4X4, V8 4spd

07-20-2002, 11:13 PM	#4
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	sounds like a good deal. an H pipe will give you alittle extra power ( you probably won't notice it) and a different sound. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

07-21-2002, 01:43 AM	#5
oleblue72 No, U Da Man! Join Date: Mar 2001 Location: Southaven, MS Posts: 284	Mine exit out behind rear tires at an angle.No H-pipe. I been very pleased with sound, performance, etc. on my mild ole 350. __________________ (sold ole blue 1972) 1997 Dodge 1500 5.9L 1996 Saturn SL2 1.9L 2002 Mitsubishi Montero 3.0L 2005 Ford Escape 3.0L *1967 Olds Vista Cruiser 330-320HP*

07-21-2002, 03:18 AM	#6
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	That's what I did with mine, except I used chambered mufflers(Summit). They were a little more than the turbo's, quieter in the cab, but screams like a bat out of hell when you put your foot on the gas. I paid $170 for 2.5" pipe, from my vette ramhorns, exiting at an angle behind the rear tires. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-20-2002, 09:55 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	$160 is d@mn good. As for a stock 350, 2 inch pipes is plenty. An H pipe is a good idea no matter what, but can make tranny removal a real PITA. You could ask to make the H-pipe removable, and to have the pipes wide enough to drop the tranny out without removing the exhaust.

07-21-2002, 11:31 AM	#7
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Thats a good deal,I would also reccomend an H pipe. The h pipe will "mellow" the exhaust note a bit,& give more performance in the low to midrange(also said to help milage), but I cant say on that one.......I usually have "five toes in the carb"! As longhorn mail has posted,I would also have the H pipe set up as removeable.......it shouldnt be too much more . Good luck......Al

07-21-2002, 11:51 AM	#8
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	My exhaust is glasspacks that dump out in front of the tire. 2 1/4 " exhaust. I would like to run it over the rear axle, because of all the noise in the cab. But my exhaust does sound nice.

07-21-2002, 12:36 PM	#9
Smitty Senior Member Join Date: Dec 1999 Location: Spring Valley, Ca. Posts: 1,133	Won't say how much I just spent on mine. But am running stock manifolds and had 2 1/4" from there to 3 chambered Flowmasters to 3" which exit out behind the rear wheel wells (to the side). I wanted to consider trans work in the future. Instead of the H pipe or equalizer the muffler shop brought them together behind the trans crossmember and siamesed them. Good sound and gave me a boost on the top end. Also they put flanges on the pipe just ahead of the mufflers which are stuffed up under the bed so I can remove them if I need to drop the trans. The 3" tailpipes were overkill I now realize that 2 1/2" probably would have been enough. But all in all I am satisfied. __________________ Smitty '71 Short Fleetside Spring Valley, Ca.

07-21-2002, 03:08 PM	#10
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	I sure believe in using the H pipe. Did you listen to mine the day we met? I can't remember if I ever had it running while you were there. I wouldn't put duals on without an H pipe myself. __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

07-21-2002, 10:06 PM	#11
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,285	Thanks guys for all your input and ideas. Sounds as if I need to check into putting the H pipe in the system. I like the idea of having it removeable if needed at some future point. barn9, never did get to hear your truck at the Winfield show. Wish I had talked to you about the exhaust question then but then can't cover everything at one time. Had a good time at that show with you, Yukon Jack and Blazerboy. Look forward to our next meeting. Plan on having my truck at that meeting when ever that happens. As an a-side, got all the lights working, cig. lighter with the little bulb also, new dash bezel looks good with all new bulbs. Nice and bright. Got the tach wired in today and it works! Only thing left to put in is the sound system, floor padding and rubber mat and the seat belts. Then it is off to get the bed spray done and the exhaust. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.