Performance parts for Harley-Davidson ™ Motorcycles

Performance never looked so GOOD!!!!

Speed And Science presents true performance add-ons for Harley-Davidson™ – proudly designed and manufactured on Canada’s West Coast.

We’ve been cutting metal since 1939! Yes, that’s right.

Enjoyed and Tested Worldwide.

This is not engine, this is ART! And yes, it's worth every cent. It's not only the price, it's also the attitude and post sales.

Thanks again for this outstanding product, everything so far on it is just perfect!

Piece of art!! The shape of the intake and exhaust channels are perfect. Proud to be a dealer of your products in the Netherlands.

Way better than anything out there. Very throttle responsive with more top end.

Got my heads today, they are AMAZING!!

I’ve been working on Harley-Davidson engines about 40 years. I bought your set of cylinders and heads - some of the best work I’ve ever seen!!!

Very impressed with the Shovel heads. Much admiration from every one.

I got heads and cylinders in Japan. Super nice, thanks!

I'm so impressed with those billet heads, they're AWESOME!