Strong testimonial on the forum at Viper Club of America:

And OH by the way we just finished the ONE LAP of AMERICA (we finished in 3rd place overall) in my 08 coupe which we made into an ACRX and part of the rebuild was a TRANZILLA rebuild the gear box was flawless during the OLOA. George is good people and will not steer you wrong. Make the change and you will not regret spending the money. It is a VERY WORTH WHILE improvement. "TRY IT YOU'LL LIKE IT"

Rockland Standard gear is the way to go- Nobody knows these Transmissions better Let them know you are a buddy and they will do everything they can for you