These high quality exhaust valves are are direct replacement for Lotus part number B910E1383F as fitted to the Esprit turbo S3, S4, S4s and Sport 300
With careful valve seat work, this will result in an increase in performance but still retain the inherent reliability offered by a sodium filled exhaust valve.
Fitting sodium filled exhaust valves with heads that are helical swirl polished will promote superior gas flow.
The helical swirl pattern reduces the thickness of the boundary air layer on the back of the valve head, thus reducing surface drag as the hot gases exit the exhaust port.
For full technical and dimensional details, click here to view the Lotus Turbo Esprit exhaust valve data sheet
These valves are offered at $82.50 each including GST ($75.00 each excluding GST)
With careful valve seat work, this will result in an increase in performance but still retain the inherent reliability offered by a sodium filled exhaust valve.
Fitting sodium filled exhaust valves with heads that are helical swirl polished will promote superior gas flow.
The helical swirl pattern reduces the thickness of the boundary air layer on the back of the valve head, thus reducing surface drag as the hot gases exit the exhaust port.
For full technical and dimensional details, click here to view the Lotus Turbo Esprit exhaust valve data sheet
These valves are offered at $82.50 each including GST ($75.00 each excluding GST)