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.

SKU: N/A Category: Tag:


Turbosmart 38mm Wastegate Gen-V WG38 Ultra-Gate

• Turbosmart 38mm 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. The Gen 5 smaller and lighter design compared to previous versions, it fits into the 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 turbocharged vehicles with 38mm wastegate 2 bolt style “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 38mm 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 anodized 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