CTS Turbo A90/A91 B58 Toyota Supra Billet Heat Exchanger Cap

The CTS Turbo billet heat exchanger cap replaces the factory plastic component on A90/A91 Toyota Supra and G29 BMW Z4 M40i models with a precision-machined aluminium alternative. Designed specifically for the B58 engine's cooling circuit, this cap eliminates the risk of plastic degradation under heat cycling and elevated system pressures. CNC-machined from solid billet, it offers superior sealing integrity and long-term durability. A direct replacement upgrade that maintains proper coolant system function while adding a quality engineered touch under the bonnet.