[leeklm]

Originally Posted by b-man

The stock restrictive exhaust is the biggest thing hindering performance. New free flowing mufflers are needed along with it, my favorite for quiet and low restriction is the Walker Dynomax 17749 20” long muffler.

A recurve of the distributor would also be a big help.

You’d be surprised what having a more performance oriented ignition curve can do, coupled with a good exhaust it should feel like a different car.

Just a personal observation on a recent project... I am a big fan of the dynomax turbo and ultraflow. Helping a buddy with his 389 stock 335hp dyno build and installed RA exhaust manifolds along with 2.5" pipes, H, and the long case 17749 mufflers. I like quiet, but this combo was a little too quiet for my liking. Would have been interesting to try this setup with no H pipe. Might have given it just a little muscle car sound.


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[b-man]

Originally Posted by leeklm

Just a personal observation on a recent project... I am a big fan of the dynomax turbo and ultraflow. Helping a buddy with his 389 stock 335hp dyno build and installed RA exhaust manifolds along with 2.5" pipes, H, and the long case 17749 mufflers. I like quiet, but this combo was a little too quiet for my liking. Would have been interesting to try this setup with no H pipe. Might have given it just a little muscle car sound.

You can replace the 20” 17749 mufflers with 14” 17734 mufflers for a more muscular sound. A little more restrictive muffler but probably not enough difference to be concerned with.

I bought a new exhaust for my VW project and it came with a 17734 muffler, go figure.

[Formulajones]

Originally Posted by b-man

You can replace the 20” 17749 mufflers with 14” 17734 mufflers for a more muscular sound. A little more restrictive muffler but probably not enough difference to be concerned with.

I bought a new exhaust for my VW project and it came with a 17734 muffler, go figure.

I'm running the A-1 Sidewinder setup on our bug with the hidden tailpipe and it uses the welded case Dynomax. Looks like the Ultraflow.