harley-davidson twin cam cnc ported heads

Looking for even more? The NRHS Stage 2 Twin Cam CNC ported heads are for the customer who wants the most out of his street engine combination. The NRHS Stage 1 CNC Twin Cam heads are proof that big performance doesn't have to carry a big price tag! The end result is a high quality pair of heads that will significantly improve the performance of your motorcycle without costing you a fortune. Finally, the heads go on the flow bench to ensure that the front and rear-head flow numbers are correct and balanced for maximum power and ease of tuning. of one another to reduce valve train harmonics to a minimum. The heads are then re-cleaned and assembled with all valve spring installed heights within. The head surface area is then flat-milled to ensure an absolutely flat gasket surface and to correct for the small amount of volume added during the valve job.

The valve job consists of a proprietary profile specific to NRHS, with the intake designed for maximum flow and the exhaust optimized for both flow and heat dissipation.

NRHS Hurricane bronze manganese guides are installed and then sized for the correct clearance.

The CNC process guarantees a level of quality and accuracy simply not possible with hand ported heads. The intake and exhaust ports are then reshaped on a state of the art CNC machine to optimize torque and horsepower producing airspeed. All valves are then inspected for straightness and then re-faced. The springs are then carefully tested for correct pressure and travel. The Stage 1 CNC treatment begins with a thorough cleaning and inspection of your heads. The best value going! The NRHS Stage 1 CNC ported Twin Cam heads are for the budget minded enthusiast who wants big torque and horsepower without spending big dollars. Customers have reported as much as 132 horsepower on totally streetable 98' motors equipped with NRHS heads! When you're ready to realize the full potential of your Twin Cam, give us a call, we'll be glad to discuss your project and make the bike of your dreams into a reality. We have tested and proven port and chamber configurations and valve sizes to help you achieve your goals, whether you're interested in big horsepower, big torque, or both. He can be reached at:įrom mild to wild, NRHS has extensive experience and success with Twin Cam heads. He has been doing the headwork for us for over 5 years now and he will continue to provide the products you have come to expect from NRHS. NRHS has sold the head porting part of our business to our lead machinist Zach. NRHS - High Performance for your Harley Twin Cam, Evolution, Sportster or Buell!

Harley-davidson twin cam cnc ported heads