RTS's new SFI 29.2 certified flexplates for the Aussie favourite RB30 engine are designed to be a true upgrade for many street and race applications. These explosion proof, billet carbon steel flexplates have gone through SFI's thorough testing procedures to produce a flexplate that will exceed all expectations . Designed for high performance RB30 engines paired with JATCO 4-speed automatic transmissions, they are extremely lightweight despite their billet steel construction. Quicker launches, excellent engine response and more consistent shifting are what you can expect from RTS billet steel Flexplates! Suitable for the following vehicles with the factory JATCO 4-speed transmissions: For Nissan RB30ET Holden VL Commdore RB30ET FEATURES Explosion Proof Billet Steel. Billet CNC machined to factory specs. Capable of massive horsepower . 10mm material thickness SFI Certified