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Wastegates
On a turbocharged engine, building boost fast is the name of the game. However, making too much boost can lead to disaster. That’s where the wastegate comes in to save...
On a turbocharged engine, building boost fast is the name of the game. However, making too much boost can lead to disaster. That’s where the wastegate comes in to save the day!
Inside of a wastegate is a spring pressing against a diaphragm. Once the pressure of the air leaving the compressor exceeds the pressure of the spring, it moves the diaphragm, which is linked to a bypass valve before the exhaust turbine. The bypass opens, and some of the exhaust gas pressure is released into the exhaust (or, on some race vehicles, the atmosphere), mitigating boost.
An internal wastegate actuates a bypass valve located inside the...
On a turbocharged engine, building boost fast is the name of the game. However, making too much boost can lead to disaster. That’s where the wastegate comes in to save the day!
Inside of a wastegate is a spring pressing against a diaphragm. Once the pressure of the air leaving the compressor exceeds the pressure of the spring, it moves the diaphragm, which is linked to a bypass valve before the exhaust turbine. The bypass opens, and some of the exhaust gas pressure is released into the exhaust (or, on some race vehicles, the atmosphere), mitigating boost.
An internal wastegate actuates a bypass valve located inside the turbocharger itself, while an external wastegate operates a bypass valve separate from the turbocharger. An internal wastegate system is more compact and requires less plumbing (most OE turbochargers use an internal wastegate), but is limited by the housing of the turbocharger. Most high performance and racing vehicles use an external wastegate system for its greater versatility.
Top Brands
When it comes to protecting your turbocharger and engine, you want a wastegate from a trusted manufacturer. That why Summit Racing Equipment only partners with proven brands like STS Turbo, Precision Turbo & Engine, Turbosmart, and VS Racing.
Showing In Stock Items. Show All 16 Items.
Wastegate, Mechanical, 40mm Diaphragm type, Stainless Base, Black Anodized Aluminum Top Cap, Each
Part Number: GAP-908827-0003
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Wastegate, Mechanical, 40mm Diaphragm type, Stainless Base, Blue Anodized Aluminum Top Cap, Each
Part Number: GAP-908827-0002
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Wastegate, Mechanical, 50mm Diaphragm type, Stainless Base, Blue Anodized Aluminum Top Cap, Each
Part Number: GAP-908829-0002
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Wastegate, Mechanical, 50mm Diaphragm type, Stainless Base, Black Anodized Aluminum Top Cap, Each
Part Number: GAP-908829-0003
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Wastegate, Mechanical, 45mm Diaphragm type, Stainless Base, Blue Anodized Aluminum Top Cap, Each
Part Number: GAP-908828-0002
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Wastegate, Mechanical, 40mm Diaphragm type, Stainless Base, Red Anodized Aluminum Top Cap, Each
Part Number: GAP-908827-0001
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Wastegate, Mechanical, 45mm Diaphragm type, Stainless Base, Silver Anodized Aluminum Top Cap, Each
Part Number: GAP-908828-0004
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Wastegate, Mechanical, 45mm Diaphragm type, Stainless Base, Black Anodized Aluminum Top Cap, Each
Part Number: GAP-908828-0003
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
