£165.00

TGS Tuning Coolant Expansion Tank is the ideal choice to eliminate the OEM & other aftermarket AST (air separator tank) on the 93+ Mazda FD RX-7.

- Made In The UK
- Replaces both the factory thermostat housing/water neck & the air separator tank.
- billet aluminum filler neck, precision machined & beautifully TIG welded.
- Simple, 100% direct bolt-on complete with mounting bolts.
- Works with the factory metric thread water level sensor and factory AST cap.
- Compact design allows added clearance for large turbochargers.
- Increased water transfer & air separation.

- All products are Pressure tested before shipping.

- 38mm bead rolled coolant pipe inlet

NOT FOR STOCK TWIN TURBOS

This tank will not work with the stock oem airpump,

The tank has been tested and works with the DM Motorsports Underdrive water pump pulleys and maybe other makes.

Radiator extra fitting is only needed if your using the return from the old AST tank to the radiator, We dont use this line on the shop RX7 and just cap off at the rad for a cleaner look.