Now could be the time to 'upgrade' that cylinder Head. Thumper Performance Ported Cylinder Heads have been proving themselves all around the World. With MORE Power on the r50's and the r53's. Get a cylinder Head that is made to YOUR needs and driving habits. Bolt on Power and Performance and also the added advantage of more MPG!! We offer THREE different models.. Because we do our own work, we can modify the Heads to your spec., More compression wanted?? Running the OVAL Tube OBXr Header ?? High lift camshafts and need more valve train clearance?? We do the custom builds that you might have a hard time finding from other Cylinder Heads. . TPR1 $1295.00 TPR2 $1695.00 TPR2r $1895.00 Running your car at the track on weekends?? You installed the Schrick camshaft, as that was the best at the time. And you have been thinking of upgrading your camshaft for more power in the lower rpm range to get you out of the turns and faster to the straights?? Feel the need for a bit more torque on the DD when the track isnt the issue, and yet dont want to loose that strong top end charge of the Schrick?? It is as easy as advancing the Schrick Camshaft !! ( the AdjustED cam gear also shows power gains on most ALL camshafts.. email for more info) My AdjustED Cam gear WILL BE AdjustED for your camshaft and a bolt on easy part, to gain the torque and HP from the camshaft. No need to spend on a new camshaft... use what you have and Rock!! AdjustED Cam Gear: $225.00 Exchanged FREE Shipping in US and the UK How about Compression!! Need more than the 8.3:1 with the r53?? Looking at 8.5... or 8.7 :1 compression?? Onna Budget and really dont want expense to rebuild the engine with NEW Pistons to bump the compression?? MILL The HEAD!! Tighter combustion chambers equal more compression. With the head now closer to the crankshaft.. this make the Cam Tension close to its max travel!! Not an issue any more... Thumper Performance's New modified Cam Tension Nut!! By moving the hydraulic tension closer to the chain rail.. problem is gone!! Cam Plug $37.95 with Milled Thumper Head/ $47.95 by itself!! Check out more bits on Thumper Performance | The OTHER MINI Head! Or email me at: [email protected] Thanks Thumper