Originally Posted by Kanea6

iam running the grp .12 and .21 onroad engines in my cars, i use too run the ninja both .12 and .21 onroad motors and the ninja compared to the grp is awsome the ninja was lacking bottom end i found, but with the grp there is so much bottom end its not funny and better still there is heaps of top end, ive been racing against the novarossi's and there not that much quicker, but the grp is a great cheap motor