Hi,

I have just obtained a inverted Slimline muffler for my 1.8 Moki, and was wondering if anyone has any data about the stinger pipes' length?

The two pipes are 4" long and protude about 2.5" of this out the bottom of the cowl on my P51. I would like to reduce the length outside the cowl, but I understand that just cutting them off is not going to be without its problems.

I presume that the length of the pipes affect noise levels and back pressure? If they are cut, does this mean that back pressure is reduced proportionally?Could this reduction in back pressure be accounted for by inserting a narrower pipe piece ( restrictor) in the end of the stingers?

Any info or ideas on this would be appreciated.

Cheers,
Merlin Man.