[Dinan_Engineering]

Originally Posted by secretsquirrel

I think everyone would like to have options (valved), but at what cost?

Originally Posted by tifosielia

+1 for valved.

Originally Posted by football76

+1 for a valved system.

Originally Posted by zinner

I find that the valved exhausts let you have the best of both worlds

Originally Posted by goj

I am a huge fan of what you can do with a valve controlled system.

It appears we are going with the valved system. I misspoke earlier by the way... the stock system has a set of valves (primary and secondary) whereas the MPE only has 1 valve. Our system will only have 1 valve as well.

[Bee Pee]

Originally Posted by Dinan_Engineering

We are internally debating which way to go. The stock exhaust has a secondary valve whereas the M Performance exhaust eliminates the valve as an example.

From my understanding the leading design can go either way.

Is there a preference amongst the masses that I should be passing along? =)

I'm to understanding of the F3x B58 exhaust is the following:-

stock - valved in LH tailpipe
MPE axle back - no valves
MPPK/sound CBE - has dual valves ie 1 each side ie both V/V's open means complete bypass of the rear muffler

[zohairhkhan]

so does every 335 fit on a 340?