TiAL Sport

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The F41 bridges the gap between the 38mm and 44mm units.  It has a unique 4 bolt design that is backwards compatible with the old TiAL F40 wastegate.  This is the perfect wastegate for those that need a bit better diaphragm to valve ratio over the 44mm.  The F41 is no longer in production, after the current stock is depleted no more will be made.



  • High temp NiCrFe based alloy valve and 347SS valve housing offer longer product life compared to competing designs.
  • High temperature silicone Nomex reinforced actuator diaphragm.
  • 17-7 PH Stainless Steel actuator spring gives consistent pressure at high temperature and resists "relaxing" up to 900F (483C).
  • Nitronic 60 Stainless Steel is used for the valve seat, and valve bushing.
  • All Stainless Steel hardware.
  • Mating weld flanges are 304L
  • Color anodized aluminum actuator (Silver, Red, Blue, Purple, Black).

Whats in the Box

Included with every TiAL F41:
F41 Assembly
F41 Valve Seat
2 TiAL Air Fittings
8 SS Allen Head Bolts and Washers

TiAL Racing Valve Stem

alt TiAL's F41 is equipped with the racing valve stem. The wear coating is resistant to the corrosive effects of lead oxide which is present when running leaded racing fuel.


F41 Option
Flange Materials 304L Stainless
Pipe Size Inlet Flange: 1.50" OD, Outlet Flange: 1.50" OD
Colors Black, Blue, Red, Purple, Silver
Spring Pressures .25bar to 1.6bar
Thread Air Ports (2): M10 x 1.0

F41 Wastegate Gallery