K5 Blazer Exhaust System Options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mil-Spec · 07-28-2016, 06:49 PM

Hey all,

Lookin to replace my exhaust system on my 86 Blazer. Mine has returned to mother nature. I see mostly 2 inch and 2.25 inch systems.

Does anyone make a 2.5 or 3 maybe inch? Would prefer a header back dual system.

Thanks

68Timber · 07-28-2016, 08:34 PM

I think Pypes had a 2.5" system but that's the largest I've seen.

tobiahr · 07-29-2016, 02:32 PM

anything larger will hurt the power unless you are burning nitro methane

phillipm · 07-29-2016, 07:05 PM

Quote:

Originally Posted by Mil-Spec

Hey all,

Lookin to replace my exhaust system on my 86 Blazer. Mine has returned to mother nature. I see mostly 2 inch and 2.25 inch systems.

Does anyone make a 2.5 or 3 maybe inch? Would prefer a header back dual system.

Thanks

I think I used a Hooker kit. It was 2.5". I bought it from Summit.

Mil-Spec · 07-29-2016, 09:23 PM

Thanks. It's a 6.2 Diesel so the idea is to free up the exhaust a little more than stock and lower the EGTs if I turn up the injection pump.

68Timber · 07-29-2016, 09:57 PM

If it's still NA you won't need more than 2.25" duals.

Ski-me · 07-31-2016, 09:21 AM

I did this one from flowmaster... 3" piping. Single out though and more stock looking. Nice sound though.

https://smile.amazon.com/Flowmaster-...exhaust+system

07-28-2016, 06:49 PM	#1
Mil-Spec Registered User Join Date: Sep 2008 Location: Dayton, Ohio Posts: 109	K5 Blazer Exhaust System Options Hey all, Lookin to replace my exhaust system on my 86 Blazer. Mine has returned to mother nature. I see mostly 2 inch and 2.25 inch systems. Does anyone make a 2.5 or 3 maybe inch? Would prefer a header back dual system. Thanks __________________ SEMPER FORTIS U.S. NAVY 97-05 USAF 94-97

07-28-2016, 08:34 PM	#2
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: K5 Blazer Exhaust System Options I think Pypes had a 2.5" system but that's the largest I've seen. __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

07-29-2016, 02:32 PM	#3
tobiahr Registered User Join Date: Nov 2007 Location: Lincoln NE Posts: 513	Re: K5 Blazer Exhaust System Options anything larger will hurt the power unless you are burning nitro methane __________________ Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=511830

07-29-2016, 09:23 PM	#5
Mil-Spec Registered User Join Date: Sep 2008 Location: Dayton, Ohio Posts: 109	Re: K5 Blazer Exhaust System Options Thanks. It's a 6.2 Diesel so the idea is to free up the exhaust a little more than stock and lower the EGTs if I turn up the injection pump. __________________ SEMPER FORTIS U.S. NAVY 97-05 USAF 94-97

07-29-2016, 09:57 PM	#6
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: K5 Blazer Exhaust System Options If it's still NA you won't need more than 2.25" duals. __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

07-31-2016, 09:21 AM	#7
Ski-me Registered User Join Date: May 2012 Location: Colo Springs, CO Posts: 870	Re: K5 Blazer Exhaust System Options I did this one from flowmaster... 3" piping. Single out though and more stock looking. Nice sound though. https://smile.amazon.com/Flowmaster-...exhaust+system __________________ - Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L

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