Exhaust Question

[legopnuematic]

$221.00 from Summit for manifold back dual kit Just pick your offset in/out mufflers.

But a nice single exhaust isn't bad either.

You could fab up an all stainless side pipe exhaust.

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Was about $400 to do that with me fabbing everything up. Pipes, mufflers, bends, flex, vee bands. Not including cost of headers as I had traded labor for them.

But should last forever.

 

[Confused]

For a single exhaust pick the longest muffler you can get under there.The longer the case the quieter the muffler.On a single exhaust 305 it will only be so loud anyway.It depends on what you want. A 20" case dynomax Super Turbo will sound nice and give a little more flow.

 

[bucket]

Everyone is overlooking pipe size. A single 2" or 2.25" exhaust pipe is fairly restrictive, even for a stock 305.

Also, ANY V8 can sound good and have a noticeable, healthy exhaust rumble if that's what you want. If it sounds like a$$, you're doing it wrong.

 

[Ken B]

I am not looking for rumble...just adequate flow. Sounds like 2.25 single is restrictive?

..

 

[bucket]

I am not looking for rumble...just adequate flow. Sounds like 2.25 single is restrictive?

..

2.5" would be ideal I'd think. 2.25" before the merge would be fine.

 

[ali_c20]

My K5 (350) setup is 2.25" and merge in a 3" pipe with a big muffler. Muffler is perforated tube with packing. Pulls good (as good as 260hp crate pulls ) and has a nice deep not loud tone.

 

[Latetotheparty]

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...

​

 

[bucket]

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...

​

I'd pick option #3, but then register it properly after your LS swap, if you find yourself driving it well outside the limits of the antique tag. Probably cheaper than doing the exhaust twice.

 

[Grit dog]

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

Well , 52 year old Grit dog decided that 10 year old grit dogs favorite exhaust was the quick and easy answer. Side pipes ftw!

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