Anybody running Spintech mufflers? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sweet72 · 10-21-2005, 08:36 PM

I'm planning an exhaust system for the 383 in the GMC and want to go with Spintechs, but not sure which model. I don't really want to attract the law so I think the Prostreet's are out of the question. The plan is to run 2 1/2" duals with crossover pipe behind Thorley Tri-Y headers and exit either before the rear wheels or in the stock location. Any and all opinions are appreciated.

jamesi20 · 10-21-2005, 09:00 PM

never used the spintech's but if you are going to use the truck as a daily driver,you probably don't want them exiting in front of the rear tires.

**truckdude239** · 10-21-2005, 09:05 PM

don't take the pipes out infoont opf the tires if its an every day driver because the heat from the pipes will heat your tires up and wear them out faster.

Sweet72 · 10-22-2005, 07:22 AM

Nobody runnin' Spins? I can't decide between the Sportsman and Sportsman XL mufflers. The XL being a little quieter since the muffler has a larger body and more baffles. Anyone?

Sweet72 · 10-22-2005, 03:14 PM

Ttt

4x4Poet · 10-22-2005, 04:54 PM

I luv Spintechs, too. Best mufflers out there, IMO. Take a good look at the length/width/height dimensions. That may drive your choice based on the space available where you expect to hang them.

Even the quieter models flow well due to the vortec and venturi effect of their SpinTraps. But for sheer performance, there's no substitute for their louder offerings. Everything's a compromise, but, IMO, Spintech mufflers compromise less performance for any sound reduction achieved compared to other muffs.

Aweful expensive to get that benefit, though. Only drawback, IMO.

Sweet72 · 10-22-2005, 05:54 PM

Hey Big Sky thanks for the info. I have family out there From Bozeman to Glendive. I guess my decision is going to be based on noise level. Which model do you have and how loud are they compared to say a Flowmaster 40? I like the flow numbers of the Spins and the sound bytes on their website are on real lopey prostreet type cars so I can't really tell how they'll sound on a 383 with a relatively mild cam. Thanks for your input.

cst70rocket · 10-22-2005, 06:20 PM

Go with the sportsman XL. People will ask you what you've got for mufflers guaranteed.
Kirk

10-21-2005, 08:36 PM	#1
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Anybody running Spintech mufflers? I'm planning an exhaust system for the 383 in the GMC and want to go with Spintechs, but not sure which model. I don't really want to attract the law so I think the Prostreet's are out of the question. The plan is to run 2 1/2" duals with crossover pipe behind Thorley Tri-Y headers and exit either before the rear wheels or in the stock location. Any and all opinions are appreciated. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

10-21-2005, 09:00 PM	#2
jamesi20 Senior Member Join Date: May 2002 Location: NORTHEAST OHIO Posts: 493	Re: Anybody running Spintech mufflers? never used the spintech's but if you are going to use the truck as a daily driver,you probably don't want them exiting in front of the rear tires.

10-21-2005, 09:05 PM	#3
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Anybody running Spintech mufflers? don't take the pipes out infoont opf the tires if its an every day driver because the heat from the pipes will heat your tires up and wear them out faster.

10-22-2005, 07:22 AM	#4
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: Anybody running Spintech mufflers? Nobody runnin' Spins? I can't decide between the Sportsman and Sportsman XL mufflers. The XL being a little quieter since the muffler has a larger body and more baffles. Anyone? __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

10-22-2005, 03:14 PM	#5
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: Anybody running Spintech mufflers? Ttt __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

10-22-2005, 04:54 PM	#6
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	I luv Spintechs, too. Best mufflers out there, IMO. Take a good look at the length/width/height dimensions. That may drive your choice based on the space available where you expect to hang them. Even the quieter models flow well due to the vortec and venturi effect of their SpinTraps. But for sheer performance, there's no substitute for their louder offerings. Everything's a compromise, but, IMO, Spintech mufflers compromise less performance for any sound reduction achieved compared to other muffs. Aweful expensive to get that benefit, though. Only drawback, IMO. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. Last edited by 4x4Poet; 10-22-2005 at 04:57 PM.

10-22-2005, 05:54 PM	#7
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: Anybody running Spintech mufflers? Hey Big Sky thanks for the info. I have family out there From Bozeman to Glendive. I guess my decision is going to be based on noise level. Which model do you have and how loud are they compared to say a Flowmaster 40? I like the flow numbers of the Spins and the sound bytes on their website are on real lopey prostreet type cars so I can't really tell how they'll sound on a 383 with a relatively mild cam. Thanks for your input. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. Last edited by Sweet72; 10-22-2005 at 05:58 PM.

10-22-2005, 06:20 PM	#8
cst70rocket Registered User Join Date: Sep 2005 Location: San Angelo or Eufaula Posts: 301	Re: Anybody running Spintech mufflers? Go with the sportsman XL. People will ask you what you've got for mufflers guaranteed. Kirk



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