Cant beat a dog box for the gear change. for sprints or Track use, and also transforms a car just by keeping on song better.


R+D are fine for the power. Matters on the age, as the earlier one's had failures due to manufacture quality.


i run (sean B's old box) a 6 speed with a over drive 6th (same as std 5th), on a 3.6 final, abit talled geared in 1st.
i've had a failure, due to my error of hitting 2nd abit to fast.
But other than that, it done 6k hard miles, inc hundreds of launching, trackdays and testing. thats on a 440+ bhp/lbft engine (Dyno'd at 505bhp and 447lbft on a slightly smaller turbo) And car wiegh's 1365kg with driver on the road, 1305 kg with driver for sprints and track.

Other people known to test the box hard,
Martin H, Steve Scott with both mid 10's for the 1/4 mile.

Its not as good as a FFD box, but hay it turns my wheels.