straight-through design mufflers

[Martice]

The straight trow muffler design has proven and its the most utilizated muffler in all modern tuned cars right now.I've used them on H2O engines and the sound is amaizing.I belive that on any h2o car they make a big difference and everyone uses them. :silly:

Now, for aircooled engines the turbo muffler seems to give the best sound, not too loud but deep mellow sound.The same sound, deep mellow performance sound, can be heard at any h2o engine with a straight trow muffler.
Even if you use only the final muffler on a h2o engine(eliminating the catalizator-thats in romanian and the seconadary muffler) the sound is still great.I really do not know what Porsche tunners are using on the h2o boxer engines but on Subaru Impreza WRX, which engine is boxer, the straight-through design mufflers are used by most tuners.

Has anyone ever tryed this straight-through design mufflers on aircooled vw/porsche engines?How do they sound?Back pressure? power?

DINOMAX Ultra Flo™ Welded Universal Muffler :
[IMG]www.dynomax.com/images/UltraFloWeld_cutaway.gif[/IMG]