Dual Exhaust Set Ups? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HYPERMAN · 06-11-2002, 08:26 PM

I am ready to install exhaust on my 68 Short Step. It has a V8 with both ramhorns curling back.

I would like to know what you guys run...pipe size, offset/center exit/enter on mufflers, exit before wheels or at back.

What is the proper size for the ranhorns?

Any pictures would be cool.

I am leaning to exiting before rear wheels

PS...I am running a poly blazer tank in the rear.

thanks for any and all info.

Peter

**JIMs70GMC** · 06-11-2002, 08:35 PM

My stock ramhorns are 2" outlet. I'm replacing them with vette ramhorns in a couple weeks, they have 2.5' outlet. I'm going to run 2.5" pipe through chambered mufflers and exit before the rear wheels. As far as the mufflers go they are reversible with one end centered and the other offset. I guess the muffler man would run in the center side and out the offset side with the offset down. If that makes any sense. My ramhorns exit down as do the vette ones I'm installing. But I believe your swept back ones are 2" also. Someone will correct if I'm wrong.

JReynolds · 06-11-2002, 09:10 PM

I hope this picture will be helpful. I don't have the ramhorns, I used ceramacoat headers, but the same principals would apply. I used 2-1/2" aluminized, ran the pipe over the rear axle, tricky bends with the trailing arms & shocks, but a good exhaust man can do just about anything. I used 2-1/2" Summit turbo mufflers, but I dont have to worry about rust, as this is strictly a pleasure craft. If it was going to see bad weather, I would have gone with stainless. Again, hope this picture helps.

Longhorn Man · 06-11-2002, 10:26 PM

You just can't go wrong with side pipes man.

Mike C · 06-11-2002, 11:22 PM

On the JImmy I have 2 1/2" rams horns, 2 1/2" mandrel bent tubing and Dynomax Hemi Turbo mufflers. It has pipe exits behind the wheels that are 45 degrees to the frame and have slash cuts on the end.

Burlinator · 06-12-2002, 11:02 AM

Love the plate JR CLASSIC

O'l Buck · 06-12-2002, 12:57 PM

Mine's got 2" stainless from the original header pipes back..with stainless glasspacks.

HvyChevy454 · 06-12-2002, 04:06 PM

i have dual 3'' w/ flowmasters and h-pipe that exit the rear w/ a poly tank. its a tigt fit over the rear axle w/ 2.5'' drop. the tail pipes are turned down and tucked behind therear bumper

zardiw · 06-12-2002, 04:31 PM

Whatever you use, I'd get the X crossover from DrGas.com. It'll get ya 15 or so extra ponies, plus make it sound really COOL.........z

jhwkns · 06-13-2002, 01:57 AM

I'm using Flotech headers. 3" collectors into 2.5 pipe, turbo mufflers about 3' behind the collectors, and exiting before the rear wheels. The total cost was about $275 including the headers. It works, and sounds great.

06-11-2002, 08:26 PM	#1
HYPERMAN Registered User Join Date: Mar 2000 Location: Moncton, New Brunswick Posts: 239	Dual Exhaust Set Ups? I am ready to install exhaust on my 68 Short Step. It has a V8 with both ramhorns curling back. I would like to know what you guys run...pipe size, offset/center exit/enter on mufflers, exit before wheels or at back. What is the proper size for the ranhorns? Any pictures would be cool. I am leaning to exiting before rear wheels PS...I am running a poly blazer tank in the rear. thanks for any and all info. Peter

06-11-2002, 08:35 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	My stock ramhorns are 2" outlet. I'm replacing them with vette ramhorns in a couple weeks, they have 2.5' outlet. I'm going to run 2.5" pipe through chambered mufflers and exit before the rear wheels. As far as the mufflers go they are reversible with one end centered and the other offset. I guess the muffler man would run in the center side and out the offset side with the offset down. If that makes any sense. My ramhorns exit down as do the vette ones I'm installing. But I believe your swept back ones are 2" also. Someone will correct if I'm wrong. __________________ 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

06-11-2002, 09:10 PM	#3
JReynolds Registered User Join Date: Jan 2001 Posts: 44	Exhaust pictures I hope this picture will be helpful. I don't have the ramhorns, I used ceramacoat headers, but the same principals would apply. I used 2-1/2" aluminized, ran the pipe over the rear axle, tricky bends with the trailing arms & shocks, but a good exhaust man can do just about anything. I used 2-1/2" Summit turbo mufflers, but I dont have to worry about rust, as this is strictly a pleasure craft. If it was going to see bad weather, I would have gone with stainless. Again, hope this picture helps. Attached Images __________________ 1969 SWB Stepside. 350 w/Vortec heads, 380 H.P., 450 ft/lb dyno proven.

06-11-2002, 11:22 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	On the JImmy I have 2 1/2" rams horns, 2 1/2" mandrel bent tubing and Dynomax Hemi Turbo mufflers. It has pipe exits behind the wheels that are 45 degrees to the frame and have slash cuts on the end. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

06-12-2002, 11:02 AM	#6
Burlinator Just Another Crazy Canuck Join Date: Dec 2000 Location: Richmond,British Columbia Canada Posts: 1,228	Love the plate JR CLASSIC __________________ 1985 454/465/205, 38.5x11-16BOGGERS soon to be installed: 14bDETROIT,Edelbrock Performer cam,intake and valve springs,Comp roller tips,MSD HEI

06-11-2002, 10:26 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	You just can't go wrong with side pipes man.

06-12-2002, 12:57 PM	#7
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	Mine's got 2" stainless from the original header pipes back..with stainless glasspacks. __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

06-12-2002, 04:06 PM	#8
HvyChevy454 Slowly getting CRSS... Join Date: Jul 2001 Location: Lutz, Florida Posts: 656	i have dual 3'' w/ flowmasters and h-pipe that exit the rear w/ a poly tank. its a tigt fit over the rear axle w/ 2.5'' drop. the tail pipes are turned down and tucked behind therear bumper __________________ -Nic Lutz, Fl My Team Website The Heavy Chevy Website ------------------ 72 Cheyenne 10 LWB GM 12-bolt 3.08 w/ Auburn Posi 91 454 Edel Performer RPM Intake 750 cfm carb Comp Cam 268/.495 Hedman Headers Dual 3'' Exhaust 71 Cheyenne 20 4x4 Fact. A/C PS PB Tilt Currently in the works... Speak Softly and Carry A Big Block... There is No replacement for Displacement... "If everything seems under control, you're just not going fast enough." - Mario Andretti

06-12-2002, 04:31 PM	#9
zardiw Faster horses, yw, ow, mm Join Date: Apr 2002 Posts: 184	Whatever you use, I'd get the X crossover from DrGas.com. It'll get ya 15 or so extra ponies, plus make it sound really COOL.........z __________________ '73 C20, 383, 3500 leaf springs, 38.5 Mickey Thompson Baja Claws (More ground clearance than an H2 Hummer), Performance Distributor (Tits!!) w/Clear cap (awesome at night), Edelbrock intake+IAS shocks, Tri Y headers, Dr. Gas Xover(for that NASCAR sound).

06-13-2002, 01:57 AM	#10
jhwkns Registered Cruiser Join Date: May 2002 Location: Las Vegas NV Posts: 2,230	I'm using Flotech headers. 3" collectors into 2.5 pipe, turbo mufflers about 3' behind the collectors, and exiting before the rear wheels. The total cost was about $275 including the headers. It works, and sounds great. __________________ I intend to live forever. So far, so good.



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