New muffler with custom exhaust

[fridsten]

This is interesting. But what engine do you have installed?

[WillH]

https://www.amazon.ca/Vibrant-Performance-10633-Muffler/dp/B00LF4VV80 is better sized for us running the flat six. Two 2.25" in one 2.5" out with the same body size. The extra 1.5" space not running a v8 and a bit more angle should help with fitment. Twice the price of the magnaflow dual/dual I thought I would eventually buy for the crossover, but less fabrication after for the tailpipe.
From the limited reviews I've found they seem to be quality mufflers.

@ Bayley
Fitment does look tight, has the car been on the road? Any contact between the muffler and the bumper cover when things start moving around. Are you worried about heat transfer to the transmission the way you have it mounted or melting the bumper cover?

[Bayley]

Originally Posted by WillH

@ Bayley
Fitment does look tight, has the car been on the road? Any contact between the muffler and the bumper cover when things start moving around. Are you worried about heat transfer to the transmission the way you have it mounted or melting the bumper cover?

Yes, I've got maybe 25-30 miles so far. I'm fighting a moderate oil leak at the moment from what I suspect is a crank position sensor that's slowly failing... but that's another story.

The muffler clearance is tight, but I don't see any signs of interference or heat getting into the bumper skin. I'll keep an eye and update after I've got a few more miles.

I'm not overly concerned about heat from the muffler getting into the transmission. Yes, there will be some... but I'm skeptical that it's enough to be concerned about. I might add a phenolic spacer of sorts at a later time. TBD.

[Bayley]

Originally Posted by fridsten

This is interesting. But what engine do you have installed?

It's a Chevrolet Gen III small block (first generation "LS" engine). It originally came from a 5.3L Silverado pickup, but has since been significantly modified to output ~450 hp. The engine is all aluminum and weighs about the same as the original 3.2L

[Dualist]

That sounds awesome mate, do you have any drone with the roof up.?

[Bayley]

Originally Posted by Dualist

That sounds awesome mate, do you have any drone with the roof up.?

Thank you.

I'm not going to sugar coat it, the exhaust does indeed drone. Top up or down, you can definitely hear it. It's substantially better with the new muffler though. The old system was almost painful at times and conversations with a passenger were almost impossible. I can actually listen to the radio now with the new muffler.

[itsnotanova]

Originally Posted by Bayley

It's a Chevrolet Gen III small block (first generation "LS" engine). It originally came from a 5.3L Silverado pickup, but has since been significantly modified to output ~450 hp. The engine is all aluminum and weighs about the same as the original 3.2L

Nice! The new muffler gives it a more European sound. Not that there's anything wrong with a lumpy American sounding V8. Just not in a Boxster

[Bayley]

Originally Posted by jakeru

Very interesting find on the vibrant muffler - thanks for sharing. I wonder if the internal construction is a "T" or a "Y". Shipping weight is listed at a bit under 20 lbs. An actual weight would be helpful.

If anyone tries this on a stock Boxster engine, it would be interesting to hear how it works.

I'd say it weighs closer to 15 lbs. It's not a feather weight, but it doesn't feel as heavy as my kid's bike.

Internal construction is a very mild "Y" design. The pipe between the two 2.5" holes is straight through design with a mild "bump" to help divert airflow from (now 'to') the 3" port.

Check out mah mad Paint skillz for an example, y0!

Originally Posted by itsnotanova

Nice! The new muffler gives it a more European sound. Not that there's anything wrong with a lumpy American sounding V8. Just not in a Boxster

Thank you. I will say that is sounds a lot better than it did when I bought the car:

"Clank - Clank - Clank - Clank - Clank - BANG! - BANG!- BANG! - wrapwrapwrapwrapwrapwrap - hissssssssss"



And no, it wasn't the IMS. The entire crankshaft broke in half.

[njbray]

That sounds good - almost like a Lambo.
I hope someone tries this on a stock motor. Who's going to be the guinea pig?
Just a case of figuring out the support brackets. It's a good price too.

[fredd5r]

I like the sound. Any hp gain with your exhaust setup?