Welcome to Billetproof Customs Blog

I decided to supplement my main website with a blog about my custom motorcycles and parts.

I presently am making custom copper 2-into-1 copper intake manifolds for the early Kawasaki KZ 400's
I have a direct bolt on version in development, and should be available very soon, sooner if there is enough interest, and/or pre-orders.

Here is the original design.

$80 U.S.D.