k & b, thunder tiger or o.s. 21 se-x

[not2bright]

k & b, thunder tiger or o.s. 21 se-x

what would be the faster .21 engine ? im looking to put it in a pay n pak

 

[[email protected]]

Re:k & b, thunder tiger or o.s. 21 se-x

If those are your only three options. Go w/the OS

 

[TomMoorehouse]

Re:k & b, thunder tiger or o.s. 21 se-x

i think there is a nice ops side exhaust that will work great..... gary preusse had some last i heard..... includes a tuned pipe

 

[mark james]

Re:k & b, thunder tiger or o.s. 21 se-x

I would concider the ops also.

they have a rear exhaust motor (you will need a 180 degree header and spring).on the outher hand .the k&b is front exhaust and you can run the pipe straight back and cost less!

good luck with your project

mark james