Exhaust Question

[TDoc]

I ordered the Dynomax squarebody universal 2.25” header back kit 89004 due to price. I was able to get summit to price match the shipped price from advance auto $144. I added (2) stainless AP Exhaust XS1255 (magnaflow generics) $44ea. I’m only into the dual exhaust conversion ~$250 (so far lol.) I’m going to attempt to connect this to my manifolds as I have some extra pipe laying around. You can either bolt this kit together with clamps or welded. According to the reviews, the u clamps that are included are terrible, either buy 2.25” narrow
Band or wide butt clamps. Better yet, weld it together if you have the skills.

I will post updates to the thread below once I get it installed.

dual exhaust kit

was curious if anyone out there has installed a Dynomax Header-Back Dual Exhaust Kits 89005 on a k5 blazer, if so id love to see some pics of how the final product looks

www.gmsquarebody.com

 

[ChuckN]

What would a 19 year old @Ken B say to you if he had the chance? Save a few bucks or go buckwild…

Dual 2.25” & a set of turbo mufflers sure do make a stock small block sound good

In high school, I had a ‘76 Nova with a 305 2 bbl. Right after my dad and I got it on the road and I started driving it, the single exhaust fell off it was so rotten.

My mom took pity on me and gave me a couple hundred bucks to run it down to Muffler Man and they put a set of duals with no name turbos. It was still slow as molasses in January, but it had a pleasant burble to it, and I could tell it had picked up a tiny bit of HP, but nothing that would win me any races on Friday night on M-59.

 

[projo198]

Ok thanks, you read my mind because that’s what I was thinking, would it make a big difference with the 305? Definitely cheaper to just replace the muffler… Do you have any suggestions of what muffler to go with? I’d like to have it a little louder than stock, but nothing too crazy.

Yes! The FlowMaster 40 is no longer patented and lots of other companies are making clones. I have 2 on my '82 longbed and they sound AMAZING!

 

[Frankenchevy]

Similar to OP, I have new to me, '86 C10 with 305. Has full registration i.e. not antique plates. Not daily driven, but used beyond the antique plate limits. Truck has a cobbled together single system (no cats! ugg). Needs complete replacement and cat install to get past the VA safety check. This truck will get an LS swap soon, but for now, I need to get it safety inspected. My options as I see them, comments or adds from anyone who has been down this road would be much appreciated...

1. head over to Midas (or other), and have them install a factory replacement single with cat. Deal with mods after LS swap. Muffler shop may not want to modify pre-cat to accommodate LS and/or headers. Might also be a bit restrictive for an LS.
2. buy Dynomax dual kit 89006 from Summit (https://www.summitracing.com/parts/wlk-89006/make/chevrolet/model/c10/year/1986, or similar), add mufflers and dual cats. Self install is ok, and requires some fab to cut in cats. Not stock, but should past a cursory safety inspector just looking for cats. Might be easiest cat compliant transition to an LS setup.
3. go back to DMV and register as antique and forget about the cats since this avoids safety inspection entirely. Requires some bending of usage limits with antique plates. Most flexible option for exhaust install.

Lemme know what y'all think...

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I’m not sure if it’s just the number of miles driven you are worried about, but I’ve heard that when your speedo cable vibrates loose and disconnects from the tail housing, it is super difficult to fix. One of those things that you might just put off to fixing until the LS swap…