Turbosmart 38mm Wastegate Gen 5 Ultra-Gate

The Gen V Turbosmart 38mm Wastegate is designed with compact size and maximum flow in mind. It provides the highest level of boost control in its class.



Turbosmart 38mm Wastegate Gen-V WG38 Ultra-Gate

• Wastegate unit (pre-assembled with spring as per order)
• SS316 Valve seat
• WG38 SS manifold gaskets
• Mounting Bolts and Nuts
• Collar tool (master/slave)
• 17/7 PH 3, 5, 7, 14 psi spring kit (1x spring installed)
• 4x 1/8” NPT plugs (1x installed) / 2x 1/8” NPT nipples
• Sticker
• Instruction card


The Gen-V WG38 Ultra-Gate external wastegate is the best 2 bolt style 38mm wastegate on the market. With it’s smaller and lighter design compared to previous versions it fits into tightest of spaces.

The internals were designed to offer the highest flow possible in a gate this size. With a unique locking collar, spring changes are a simple task.

The WG38 is constructed with the ultimate durability in mind. It’s constructed with the highest quality materials possible.



For use on older turbocharged vehicles with a 2 bolt 38mm “Delta Gate” external wastegate. Inlet Flanges suit 1.50” outside diameter pipe.


Supplied with valve seat, gaskets, all the necessary nuts and bolts, 2 x 1/8″ NPT Vacuum Fittings, Blanking Plugs, Collar removal tool. Spring options available to customer specifications.


Fits all popular 44mm flanges.  Suitable for medium-large capacity engines with medium frame turbochargers systems -or- to be used as twin wastegate configuration for high power twin-scroll setups.

Valve diameter 38mm
Mass 860g
Linearity -1.13% of full lift (BFSL)
Set pressure accuracy +/- 0.5 psi of base pressure
Safe working pressure max. 220 psi / 1520 kPa / 15 bar
Safe inverted pressure max. 180 psi / 1250 kPa / 12.5 bar
Actuator life 750k cycles @ 180ºC ambient
1000k cycles @ 80ºC ambient
Actuator/Valve ratio 2.17:1
Max. spring base pressure 26 psi / 180 kPa / 1.8 bar
Min. spring base pressure 3 psi / 21 kPa / 0.2 bar
Port fittings type Air: 2x 1/8” NPT top chamber
Air: 2x 1/8” NPT lower chamber
Liquid Cooling: 2x 1/8” NPT

Max. thermal stress (non-cooled)* >30min @ 1250ºC EGT continuous
Max. thermal stress (h2O cooled)* >24hr @ 1250ºC EGT continuous
Max. ambient/compartment temp. 260ºC / 500ºF
Max. actuator temp. 310ºC / 590ºF

Main Body High temp 347 SS
Diaphragm Proprietary Silicone w/ nomex
Actuator housing 6061 T6 anodised Al.
Valve Guide Nitronic 60
Valve EV8 w/ proprietary plating
V-Band Heat treated 431 SS w/ 18-8 nut
Springs 17/7 PH Stainless Steel
Beryllium (Be) 0%

Max. Flow 116 CFM/3.28 m3
/min @1psidP

Additional information

Wastegate Color

Black, Blue

Wastegate Spring

7 PSI Spring, 14 PSI Spring