Forge Performance Products - VW MK4 GLI & 337/20th

Since 1996, Forge Motorsport has provided innovation, clever design, and highest quality manufacturing from their in-house CNC machine shop.

Not only has Forge Motorsport made a name for themselves in supplying OE manufacturers with valves, intercoolers, and actuators, but they have excelled in the world of Motorsport with a heavy presence in F1, WRC, Rally X, and Le Mans. Look no further than Forge for all your performance needs!

Forge Ahead

Fits:
VW MK4 Jetta GLI 1.8T (2004 - 2005)
VW 337/20th (2002 - 2003)

‹ ›

Forge - Kona Cold Air Intake Kit - Carbon Fiber - (NO LONGER AVAILABLE)

For Euro Models Only MK5/6 Golf with 1.4T

Brand:

ES#: 1832483

Mfg#: FMIND01

No longer available

Front Mount Intercooler - Black Hoses - (NO LONGER AVAILABLE)

15*C / 27*F temperature drop with no loss of boost pressure

Brand:

ES#: 1832081

Mfg#: FMINTMK4F

No longer available

Front Mount Intercooler - Red Hoses - (NO LONGER AVAILABLE)

15*C / 27*F temperature drop with no loss of boost pressure

Brand:

ES#: 1832084

Mfg#: FMINTMK4FR

No longer available

Side Mount Intercooler - Polished

Fits in stock location, excellent upgrade over stock

Brand:

ES#: 1832080

Mfg#: FMINTMK4S

Qty:

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On SALE Save 10%

$655.99

This product was last offered at the strikethrough price on
08-29-2026

$589.66 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

008 Premium Diverter Valve - Anodized Black

Smaller, tougher and tuneable

Brand:

ES#: 2224448

Mfg#: FMDV008

Qty:

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On SALE Save 10%

$264.99

This product was last offered at the strikethrough price on
08-29-2026

$238.48 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Blow Off Valve - Atmospheric

34mm weld on dual piston atmospheric blow off valve for custom installs

Brand:

ES#: 1832445

Mfg#: FMDVWO34C

Qty:

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On SALE Save 27%

$216.99

This product was last offered at the strikethrough price on
08-28-2026

$157.95 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Blow Off Valve - Black

Made to mount on top of hard boost pipe

Brand:

ES#: 1832068

Mfg#: FMDV004

Qty:

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On SALE Save 10%

$212.99

This product was last offered at the strikethrough price on
08-29-2026

$190.84 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Blow Off Valve - Polished

Made to mount on top of hard boost pipe. Side vacuum port.

Brand:

ES#: 2765467

Mfg#: FMDV004A

Qty:

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On SALE Save 10%

$219.99

This product was last offered at the strikethrough price on
08-29-2026

$197.29 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Blow Off Valve - Polished

Made to mount on top of hard boost pipe. Vacuum port on top.

Brand:

ES#: 1832067

Mfg#: FMDV004C

Qty:

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On SALE Save 10%

$160.99

This product was last offered at the strikethrough price on
08-29-2026

$144.45 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Forge Supersize Recirculating Valve

Designed to offer extreme flow rates for highly modified turbocharger setups

Brand:

ES#: 1832441

Mfg#: FMDVSUPRC

Qty:

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On SALE Save 10%

$180.00

This product was last offered at the strikethrough price on
08-29-2026

$162.00 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Splitter Valve - Black

Recirculation & blow off valve all in one for customers that want both styles

Brand:

ES#: 8288

Mfg#: FMDVSPLTR

Qty:

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On SALE Save 10%

$310.99

This product was last offered at the strikethrough price on
06-18-2026

$279.12 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Splitter Valve - Polished

Recirculation & blow off valve all in one for customers that want both styles

Brand:

ES#: 1832064

Mfg#: FMDVSPLTRC

Qty:

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On SALE Save 10%

$287.99

This product was last offered at the strikethrough price on
08-29-2026

$258.44 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Atmospheric Blow Off Valve Fitting Kit - Black - (NO LONGER AVAILABLE)

Installation hardware for blow off valve, includes black hoses.

Brand:

ES#: 1832458

Mfg#: FMFK004

No longer available

Atmospheric Blow Off Valve Fitting Kit - Blue Hoses - (NO LONGER AVAILABLE)

Installation hardware for blow off valve, includes blue hoses

Brand:

ES#: 2695471

Mfg#: FMFK004-BLU

No longer available

Diverter Valve Relocation Kit - Black Hoses - (NO LONGER AVAILABLE)

Relocate the diverter valve from the hot side of the turbo to the cold side.

Brand:

ES#: 261319

Mfg#: FMDVRLK

No longer available

Diverter Valve Relocation Kit - Blue Hoses - (NO LONGER AVAILABLE)

Relocate the diverter valve from the hot side of the turbo to the cold side

Brand:

ES#: 1832430

Mfg#: FMDVRLKB

No longer available

Diverter Valve Relocation Kit - Red Hoses - (NO LONGER AVAILABLE)

Relocate the diverter valve from the hot side of the turbo to the cold side

Brand:

ES#: 1832431

Mfg#: FMDVRLKR

No longer available

DV Tuning Kit

Fine tune your Blow Off/Diverter Valve to the exact needs of your engine with this complete tuning kit.

Brand:

ES#: 1832055

Mfg#: FMDVTUN

Qty:

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On SALE Save 10%

$39.99

This product was last offered at the strikethrough price on
08-29-2026

$35.91 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

K04 1.8T Turbo Wastegate Actuator

Increase boost in your engine with this new actuator

Brand:

ES#: 1832380

Mfg#: FMACVAG01

Qty:

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On SALE Save 10%

$277.99

This product was last offered at the strikethrough price on
08-29-2026

$250.09 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Wastegate Actuator Spring Tuning Kit

Fine tune your wastegate to the exact needs of your engine

Brand:

ES#: 1832543

Mfg#: FMPACTUN

Qty:

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On SALE Save 10%

$52.99

This product was last offered at the strikethrough price on
08-29-2026

$47.68 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Manual Boost Controller - Black - Mini

In-car boost controller for fine tuning

Brand:

ES#: 1832074

Mfg#: FMICB051

Qty:

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On SALE Save 11%

$78.99

This product was last offered at the strikethrough price on
08-29-2026

$70.34 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Manual Boost Controller - Polished

Lockable under-hood boost controller

Brand:

ES#: 1832070

Mfg#: FMBV050C

Qty:

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On SALE Save 12%

$34.99

This product was last offered at the strikethrough price on
08-29-2026

$30.78 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Manual Boost Controller - Polished

In-car boost controller for fine tuning

Brand:

ES#: 1832076

Mfg#: FMICB051C

Qty:

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On SALE Save 11%

$72.99

This product was last offered at the strikethrough price on
08-29-2026

$65.13 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Manual Boost Controller-Polished

In-Car boost controller. Valve only, does not come with hoses or any accessories

Brand:

ES#: 7932

Mfg#: FMICB051 POLISH

Qty:

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On SALE Save 10%

$69.99

This product was last offered at the strikethrough price on
08-29-2026

$62.96 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

Throttle Body Hose - Black - (NO LONGER AVAILABLE)

From the stock intercooler to the throttle body

Brand:

ES#: 1832531

Mfg#: FMKTICTB

No longer available

Throttle Body Hose - Blue - (NO LONGER AVAILABLE)

From the stock intercooler to the throttle body

Brand:

ES#: 1832532

Mfg#: FMKTICTBB

No longer available

Throttle Body Hose - Red - (NO LONGER AVAILABLE)

From the stock intercooler to the throttle body

Brand:

ES#: 1832533

Mfg#: FMKTICTBR

No longer available

19-25mm PCV Valve Adapter - Black

The perfect component for those upgrading their PCVs

Brand:

ES#: 2597318

Mfg#: S25-19BLK

Qty:

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On SALE Save 10%

$14.99

This product was last offered at the strikethrough price on
08-29-2026

$13.46 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

19-25mm PCV Valve Adapter - Blue

The perfect component for those upgrading their PCVs

Brand:

ES#: 2497366

Mfg#: S25-19BLUE

Qty:

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On SALE Save 10%

$14.99

This product was last offered at the strikethrough price on
08-29-2026

$13.46 USD

Free Shipping

on orders $49 and up

Lifetime Replacement

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Forge Performance Products - VW MK4 GLI & 337/20th

Forge Ahead