Crossover pipe on a 4x4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69-72 · 08-07-2011, 08:08 PM

Anyone have a crossover on their 4x4 Blazer.

I would like to add one to quiet things down and help my Blazer sound less like a tractor but I can't see where one could be routed.

1971k567cam · 08-07-2011, 08:54 PM

Just got mine done a week ago turned out awsome but really tight fit. Name: 2011-08-07_17-49-50_589.jpg
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Burt4x4 · 08-08-2011, 10:36 AM

I run a H pipe..right behind the transfer case...

The only pics I could find...thoes are 50s Flowmasters

69-72 · 08-08-2011, 02:21 PM

Thanks for the pictures, looks like it has to go behind the transfer case, it would be interesting to see how they did the single exhaust originally, it is pretty tight up under the engine to have a pipe go across.

So does the pipe make a noticeable difference?

Burt4x4 · 08-08-2011, 04:33 PM

Not sure. I swaped out my 350 and put in a EFI454 and new exahust so...it's like a whole new truck and sound

I heard alot of positive comments about H-pipe or X-pipe and from what I read yer suppose to stay closer to the collecters than I am but thats all the room I had for one. Mine is a quite rumble at idle but it still RAPPPPS when you hit the trottle

My old 350 was hella loud with 2chamber flows...kinda sucked trying to sneak into a camground at 1am so I went for something quiet down low.

**jaros44sr** · 08-08-2011, 05:59 PM

looks like a 'H' pipe would be the easiest to fit, maybe with flanges or 'V' band clamps

BobbyK · 08-09-2011, 12:56 PM

On my 71.
2.5" tubing.

.

**jaros44sr** · 08-09-2011, 01:34 PM

Bobby K, any idea what that angle is under the transfer case? I think you saved me some critical whiskey time....

Hijack off

kilomanjaro · 09-11-2011, 11:55 AM

Did you guys hear a big difference in the sound of your exhaust with the h-pipe? Anyone try to fit an x-pipe? I really want my exhaust to have that non-pulsing low rumble that I associate with crossovers. I have been told by different people with the blazers short exhaust and with the inability to install it closer to the manifolds that it doesnt make any sound difference.....just wondering what you experience is.
John
Posted via Mobile Device

Firebirdjones · 09-11-2011, 02:17 PM

Quote:

Originally Posted by BobbyK

On my 71.
2.5" tubing.

.

Mine is exactly like this one, although not as shiny anymore, it was done back in the mid 90's

It's really the easiest and most convient place to put one. It toned my exhaust down quite a bit and took the cackle out of it. Still a little more throaty than I want but that's due to the Mac Mufflers on there.

69-72 · 09-11-2011, 02:43 PM

Got mine done last weekend, for anyone that is looking to get it done I got an exhaust place to make up a 2 ft long pipe with a 25 degree bend in the middle. Got it for free too since they got a good laugh out of the 2x3 pieces of wood screwed together I gave them as a template.

It is a bit quieter, didn't do as much as I hoped, although it seems to run smoother now.

I still have a tractor type of sound at cruising speed that I am not happy with. I have Walker mufflers which are apparently the quietest turbo mufflers that exist on it with new 2 1/4" pipes

Firebirdjones · 09-11-2011, 06:00 PM

Quote:

Originally Posted by 69-72

Got mine done last weekend, for anyone that is looking to get it done I got an exhaust place to make up a 2 ft long pipe with a 25 degree bend in the middle. Got it for free too since they got a good laugh out of the 2x3 pieces of wood screwed together I gave them as a template.

It is a bit quieter, didn't do as much as I hoped, although it seems to run smoother now.

I still have a tractor type of sound at cruising speed that I am not happy with. I have Walker mufflers which are apparently the quietest turbo mufflers that exist on it with new 2 1/4" pipes

Yes Walker makes very quiet turbo mufflers. I haven't personally used them for years so I can't remember how they sounded exactly, but that tractor sound you describe isn't too appealing

I've been using Pypes mufflers the last 2-3 years and I'm happy with the sound and performance. So much so, that I've been cutting off older mufflers on some of the cars that I've had for 25 years and welding Pypes mufflers in their place. I'm about ready to do the same thing on my blazer now, I'm tired of the Mac mufflers on there, it's a bit noisy under load.
Guess you get that way when you get old

08-07-2011, 08:08 PM	#1
69-72 Registered User Join Date: May 2008 Location: 204 Posts: 903	Crossover pipe on a 4x4 Anyone have a crossover on their 4x4 Blazer. I would like to add one to quiet things down and help my Blazer sound less like a tractor but I can't see where one could be routed. __________________ 1969 Chevy Custom Camper 3/4 ton Rust free survivor 1972 Chevy Blazer CST 4x4 Almost Rust free survivor 1972 GMC Jimmy 2wd Undergoing surgery

08-07-2011, 08:54 PM	#2
1971k567cam Registered User Join Date: Dec 2010 Location: Tumwater,Wa Posts: 149	Re: Crossover pipe on a 4x4 Just got mine done a week ago turned out awsome but really tight fit.

08-08-2011, 10:36 AM	#3
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: Crossover pipe on a 4x4 I run a H pipe..right behind the transfer case... The only pics I could find...thoes are 50s Flowmasters __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

08-08-2011, 02:21 PM	#4
69-72 Registered User Join Date: May 2008 Location: 204 Posts: 903	Re: Crossover pipe on a 4x4 Thanks for the pictures, looks like it has to go behind the transfer case, it would be interesting to see how they did the single exhaust originally, it is pretty tight up under the engine to have a pipe go across. So does the pipe make a noticeable difference? __________________ 1969 Chevy Custom Camper 3/4 ton Rust free survivor 1972 Chevy Blazer CST 4x4 Almost Rust free survivor 1972 GMC Jimmy 2wd Undergoing surgery

08-08-2011, 04:33 PM	#5
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: Crossover pipe on a 4x4 Not sure. I swaped out my 350 and put in a EFI454 and new exahust so...it's like a whole new truck and sound I heard alot of positive comments about H-pipe or X-pipe and from what I read yer suppose to stay closer to the collecters than I am but thats all the room I had for one. Mine is a quite rumble at idle but it still RAPPPPS when you hit the trottle My old 350 was hella loud with 2chamber flows...kinda sucked trying to sneak into a camground at 1am so I went for something quiet down low. __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

08-08-2011, 05:59 PM	#6
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,764	Re: Crossover pipe on a 4x4 looks like a 'H' pipe would be the easiest to fit, maybe with flanges or 'V' band clamps __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

08-09-2011, 12:56 PM	#7
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,772	Re: Crossover pipe on a 4x4 On my 71. 2.5" tubing. . __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

08-09-2011, 01:34 PM	#8
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,764	Re: Crossover pipe on a 4x4 Bobby K, any idea what that angle is under the transfer case? I think you saved me some critical whiskey time.... Hijack off __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

09-11-2011, 11:55 AM	#9
kilomanjaro Senior Member Join Date: Mar 2001 Location: From Kansas now in Palmer, Alaska Posts: 807	Re: Crossover pipe on a 4x4 Did you guys hear a big difference in the sound of your exhaust with the h-pipe? Anyone try to fit an x-pipe? I really want my exhaust to have that non-pulsing low rumble that I associate with crossovers. I have been told by different people with the blazers short exhaust and with the inability to install it closer to the manifolds that it doesnt make any sound difference.....just wondering what you experience is. John Posted via Mobile Device __________________ 63 Buick Wildcat 425 72 Chevy Blazer CST 72 Chevy C10 Cheyenne 00 Ford F-350 Super Duty 7.3L 09 Dodge Challenger SRT-8 10 Ford Expedition Limited

09-11-2011, 02:43 PM	#11
69-72 Registered User Join Date: May 2008 Location: 204 Posts: 903	Re: Crossover pipe on a 4x4 Got mine done last weekend, for anyone that is looking to get it done I got an exhaust place to make up a 2 ft long pipe with a 25 degree bend in the middle. Got it for free too since they got a good laugh out of the 2x3 pieces of wood screwed together I gave them as a template. It is a bit quieter, didn't do as much as I hoped, although it seems to run smoother now. I still have a tractor type of sound at cruising speed that I am not happy with. I have Walker mufflers which are apparently the quietest turbo mufflers that exist on it with new 2 1/4" pipes __________________ 1969 Chevy Custom Camper 3/4 ton Rust free survivor 1972 Chevy Blazer CST 4x4 Almost Rust free survivor 1972 GMC Jimmy 2wd Undergoing surgery

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