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Granatelli 44mm piston external wastegate front view
Granatelli 44mm wastegate with clamps flanges seals and five springs
Granatelli piston wastegate side port view
Granatelli 44mm wastegate V-band inlet view
Granatelli black anodized wastegate top cap detail
Click to zoom in

Granatelli 44mm Piston-Actuated External Wastegate with V-Band

GMS540261
802735045468
Wastegates
29 Units In Stock
$ 270.11 $ 256.61
$ 256.61

Control boost without the footprint of a larger gate

Granatelli Motor Sports 540261 is the exact external turbo wastegate described here. Compact 44 mm valve for custom turbo-system packaging, matched to the verified configuration and application below.

Key Features

  • Compact 44 mm valve for custom turbo-system packaging
  • Piston-actuated design rather than a water-cooled diaphragm
  • Black anodized billet aluminum top cap
  • Stainless steel base with V-band inlet and outlet
  • Five variable-rate springs support base-boost setup

Fitment

No year-make-model fitment applies; match every engine-family, dimensional, mounting and electrical requirement below.

Years Make Model or Application Details
Universal Custom Turbo system Requires compatible 44 mm V-band plumbing, pressure reference, exhaust routing and verified spring setup

Specifications

Detail Value
Manufacturer Part Number 540261
Brand Granatelli Motor Sports
Product Type External Turbo Wastegate
Valve Size 44 mm
Actuation Piston
Top Cap Black anodized billet aluminum
Base Stainless steel
Connections V-band inlet and outlet
Store GTIN 802735045468; corroborated for this exact MPN by an active distributor listing

What's Included

  • One 44 mm piston-actuated external wastegate
  • V-band inlet and outlet flanges
  • V-band clamps
  • Five variable-rate springs

About Granatelli Motor Sports

Granatelli Motor Sports develops performance cooling, forced-induction and racing-control components. Selection depends on the exact part number, physical interface and intended operating system rather than appearance alone.

Related Parts

  • Only hoses, seals, wiring or mounting hardware verified for this exact component
  • Cooling-system service supplies for thermostat-housing installations
  • Circuit protection and connectors matched to the controlled electrical load

FAQ

What is the 540261?

It is the Granatelli Motor Sports external turbo wastegate in the exact configuration and application described on this page.

How should compatibility be confirmed?

Match every application, dimension, mounting point, interface and exclusion shown in the Fitment and Specifications sections.

Is the pictured configuration the item being sold?

Yes. The retained gallery shows the verified product configuration and quantity; standalone logos and text-only graphics are excluded.

Are unrelated installation parts included?

No. Components not shown or listed in What's Included must be sourced separately when the installation requires them.

Is professional installation recommended?

Yes when the work affects brakes, cooling, wiring, vehicle safety or calibrated operating systems.

Can a similar-looking part be substituted?

No. Similar products can differ in mounting geometry, temperature, rotor pattern, wiring, dimensions or included components.

What should be inspected before installation?

Inspect the mating surfaces, mounting points, hoses or wiring, clearances and every included component before modifying the vehicle.

What warranty applies?

Use the current Granatelli Motor Sports warranty terms for this exact product and application.

Installation Instructions

  1. Confirm that the turbo system is designed for a 44 mm external piston-actuated wastegate with compatible V-band inlet and outlet connections.
  2. Plan the wastegate position and exhaust routing so the valve, actuator, reference lines and dump or recirculation tube clear heat-sensitive and moving components.
  3. Install the verified spring combination for the intended base boost pressure using the current manufacturer procedure.
  4. Weld or install the supplied flanges in the correct orientation, then secure the wastegate with the supplied V-band clamps.
  5. Connect pressure-reference plumbing to the correct ports and verify that every hose is protected from heat and abrasion.
  6. Pressure-test the system, confirm free valve movement and inspect every exhaust and reference connection for leaks.
  7. Begin boost testing at low load with appropriate monitoring, then verify stable control before increasing engine load or commanded boost.
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