AST Rollcages V5 Weld-In 10-Point Roll Cage for Porsche 911 997 RWD - FIA 7Twenty They are made up of

They are made up of E355 steel main tubes with a diameter of 45 mm and secondary tubes with a diameter of 40 mm

3L (L3) DuratecDesigned to withstand high RPM temperatures and load these high strength bearings are manufactured by ACL from 3 layers of hardened steel copper and nickel

Compatibility models and engine codes : Honda B17A1/B18A1/B18B1/B18B2 (1678cc / 1834cc)

Compatibility models and engine codes : Subaru EJ15 EJ16 - 1493cc 1597cc (#3 spacer)

It allows to measure the air pressure in the intake manifold and transmit this info to the ECU which will calculate the corresponding amount of fuel to inject

AST Rollcages V5 Weld-In 10-Point Roll Cage for Porsche 911 997 RWD - FIA 7Twenty They are made up ofAST Roll Cages SpecificationsAttention : AST roll cages designed and built according to FIA Appendix J may not be approved depending on the year of preparation of your car. Indeed the safety requirements are often revised in Appendix J by the FIA. Check with your Federation Sporting Organisation for the minimum safety requirements specific to your vehicle version engine and type of event and or championship to be contested. AST roll cages have 4 to 10