KBD targa mufflers
Thread Starter
Pro
Joined: May 2018
Posts: 506
Likes: 52
KBD targa mufflers
Hi, I am planning on upgrading the exhaust on my 1985 corvette soon and am getting the kbd targa mufflers. I was wondering if there is a difference between the 2 1/2” mufflers or 3” or if it is just the tips? If it is just the tip I would get the 2 1/2”. I am getting a 3” true dual exhaust all the way back to these mufflers with a crossover.
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
If you are getting 3" all the way back, I would verify with the seller that the inlet for the KBD targa mufflers is 3."
Instead of a crossover on the rear Y-pipe, I'd go for an X pipe mid stream, closer to the headers/exhaust manifolds if you can swing it.
Instead of a crossover on the rear Y-pipe, I'd go for an X pipe mid stream, closer to the headers/exhaust manifolds if you can swing it.
Thread Starter
Pro
Joined: May 2018
Posts: 506
Likes: 52
From what i have seen both sizes in tips just change the tip and the inlet is 2 1/4” on both of them. I thought the exhaust shop would be able to use a reducer to change it to this size right before the mufflers. Or am I wrong and this would hurt the performance? If it would hurt performance I would just have to find some different mufflers but I really liked the looks of them and people said they make it sound like a 70’s muscle car plus it is like a straight pipe but it’s really a glass packed muffler inside.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
You don't say much about (any) performance mods to your car, so 2.5 will be plenty. Plus, you will only feel a difference (if any) at the far upper RPM bands.
For everyday cruising, 2.5 will be a clean install, sound great and give you a bit of a kick. Remember to get rid of your cat and put in a hi-flow catalytic. THAT will make a difference.
Last edited by billschroeder5842; Jun 12, 2018 at 02:30 PM.
Thread Starter
Pro
Joined: May 2018
Posts: 506
Likes: 52
Vader86 told me how to get up to 300 hp from the engine with 3” true dual, long tube headers which I will get later. Then port the plenum and runners and a new intake manifold. That’s why I want to get 3 inch true dual and was wondering if it would hurt the performance at all if the muffler inlets are only 2 1/2”?
