i have an old os 90 fs. its the one with the pushrods in the back of the engine instead of the front like the surpass.

i need an exaughst header and muffler for this thing. but i cant find any parts listing for it anywhere.

i think that it has the same thread in the head as the newer .91 surpass m11x.75 but i am not for certain about this . tower hobbies lists a muffler for the surpass tho i am afraid to buy it not knowing for sure if its the same

so if any one has any info on this please let me know. also if any one has the correct muffler assembly just laying around ill buy it

thanks in advance........................................... ....cantw8tofly