Cones for quieting exhaust noise!!

I'm building a '29 closed cab pickup with a SBC 383.
I picked up a set of used Speedway lakester headers with 3 1/2" cones.
I cut up a magnaflow glasspack, cut a hole in the blockoff plate and welded
in 10" of perferated tube, tacked a washer on the other end and wrapped
the packing around it and stuffed it back into the header.
It has a nice throaty sound but is a bit too loud.
Has anyone made or used perforated cones, something like the Dynatech cones that Speedway sells? How do they affect performance, good or bad?
Any other ideas or info would greatly be appreciated.

 

Forget about getting a reasonable sound level out of the lakes headers.
No type of baffles will tame them down enough. Not to mention having the exhaust noise right beside you in your ears all the time gets old really fast.

Cap them off with plates and maybe turnouts for looks and pipe the exhaust underneath and out the back with a pair of Porter mufflers and you will be much happier and have a nice sound too.

 

If you still have a flange with bolt holes; I'd spend a few minutes trying a flat plate baffle. It would be like a single disc rather than the Supertrap thing.

I have never tried it or seen it done, but old antique pop engines used a single flat disc on the bottom of a cone shaped exhaust outlet. the disc was spacer'd out from cone to let the exhaust out the sides.

 

I used these in mine. I recommend throwing away the fiberglass cover it just blows out and makes you itch.

http://www2.cip1.com/ProductDetails.asp?ProductCode=ACC-D-2538

 

I made these. They are ugly but they work.

 

ModelABrian used a set of the Dynatech inserts on the nailhead we did for him. They help but nobody is sneaking up on anybody while running these think in their collectors. Open headers are loud and are really hard to quiet down. Like the others said, the noise gets old in a hurry and if you are tired of the racket then cap the headers and put in a down tube to a set of pipes and mufflers under the car.

 

I had a 12" glass pack and the dyno max cones in my headers, they made no difference in noise. I made some baffles that worked, I took three pieces of tubing each a litlle bigger and drilled tons of holes, the exhaust had to travel in and out of each tube in there before exiting the rear of my lake pipe 3" hole I made, they made a noticeable difference. Ran great, but it's also got a 6-71.