Thinking of upgrade your GT-R performance, I would advise you to upgrade too a JUN Custom 4.0L Stroker Kit. Adding the JUN 4.0L Stroker Kit to your GT-R engine will improve your horsepower dramatically. JUN has released a true 4.0L Stroker Kit system for the Nissan GT-R for race car enthusiast. This true 4.0L Stroker Kit eliminates factory specs part of the engine. JUN has stated that this 4.0L Stroker Kit will be able to support upwards of 1000hp. The internals are specifically designed for the Nissan GT-R R35's engine. The JUN 4.0L Stroker Kit will reach the 1000hp mark when extra modifications are added. The JUN 4.0L Stroker Kit has adopted full counter form in order to balance inertia power and the centrifugal force which is generated by counter weight. As a result of pursuing the most effective form of counter weight by the thorough analysis and thorough calculation, though the increase in weight was suppressed, improvement in the rate of balance was realized.

The JUN Stroker Kit is composed of a forged 4.0L long stroke crankshaft and JUN Super Forged aluminum pistons. The JUN Stroker kit provides more power and torque capabilities of your Stroker Assemblies. The lightweight, high strength and rate of the balanced parts make for the ultimate stroker kit for your VR38DETT motor. Features include connecting rods equipped with JUN/ARP rod bolts, forged pistons that are crafted by Cosworth racing of England and a JUN forged 4.0L crankshaft. The kit comes complete with crank, rods, pistons, wrist pins, piston rings and crankshaft. It is not as an armchair theory. At JUN, the crankshaft of ideal form was made by shaving a billet material. The crankshaft made from shaving has flexibility in a design as compared with a forge product. A crankshaft designer can determine form satisfactorily. So forget those thoughts of having a factory engine on your GT-R and take a look at the JUN Custom 4.0L Stroker Kit today.