GMC Racing T25 Turbo Manifold Kit – Abarth 500 / 595 / 695 GBC20-300 & GBC22-350

GMC Racing T25 Turbo Manifold Kit – Abarth 500 / 595 / 695 GBC20-300 & GBC22-350

Developed through decades of motorsport experience, the GMC Racing T25 Turbo Manifold Kit is designed specifically for Abarth 500, 595, and 695 models running GBC20-300 and GBC22-350 turbocharger conversions.

Manufactured entirely from 1.5mm wall thickness 304 stainless steel, this manifold weighs just 3.5kg, making it one of the lightest tubular manifold solutions available for the Abarth platform. The advanced 4-into-1 collector design has been engineered to improve exhaust gas flow, reduce back pressure, lower exhaust temperatures, and maximise turbocharger efficiency.

Designed and manufactured by GMC Racing in Italy, this kit provides the ideal foundation for high-performance turbocharger conversions where the limitations of the factory manifold become a restriction.

Unlike many kits available elsewhere, our package includes both the genuine GMC Racing oil feed pipe and oil return pipe, providing a more complete installation solution and ensuring you have the components required to complete your turbo conversion.

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Vehicle Compatibility

Abarth 500 1.4 T-Jet

Abarth 595 1.4 T-Jet

Abarth 695 1.4 T-Jet

Suitable for use with:

GBC20-300 Turbocharger

GBC22-350 Turbocharger

T25 Flange Turbochargers

Please contact us with your VIN / chassis number if you are unsure of compatibility.

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What's Included

GMC Racing stainless steel T25 tubular exhaust manifold

GMC Racing stainless steel downpipe kit

GMC Racing water pipe kit

GMC Racing turbo oil feed pipe

GMC Racing turbo oil return pipe

Uniball mounting brackets and fittings

Installation instructions

GMC Racing decal

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Key Features

Designed for T25 turbocharger applications

Suitable for GBC20-300 and GBC22-350 conversions

Lightweight 3.5kg construction

Manufactured from 1.5mm wall thickness 304 stainless steel

Advanced 4-into-1 collector design

Improved exhaust gas flow

Reduced exhaust back pressure

Lower exhaust operating temperatures

Supports increased power and reliability

Integrated EGT temperature probe provision

Precision CNC-machined flanges

Motorsport-derived design

Designed and manufactured in Italy

Complete package including oil feed and oil return pipes

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4-Into-1 Collector Design

The GMC Racing 4-into-1 collector system has been developed through extensive dyno and motorsport testing. By allowing exhaust gases from each cylinder to merge efficiently, the design reduces turbulence and restriction while improving turbine efficiency.

The result is improved turbocharger response, reduced exhaust temperatures, and the potential for significant power increases compared to the factory cast manifold.

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Welding & Manufacturing Quality

Each manifold is hand-fabricated from premium 304 stainless steel and features GMC Racing's renowned welding quality. The smooth internal weld finish helps maximise exhaust flow while maintaining exceptional strength and durability under extreme operating conditions.

The precision construction and CNC-machined stainless steel flanges ensure excellent fitment and long-term reliability.

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Important Information

This manifold is designed for T25 turbocharger conversions and is commonly used with GBC20-300 and GBC22-350 turbocharger setups.

This manifold requires supporting modifications and professional installation.

ECU calibration/remapping will be required to achieve optimum performance and safe operation.

Depending on the intended power level, fuel system upgrades such as larger injectors and supporting hardware may also be required.

This kit should only be installed by a competent professional who is experienced with custom turbocharged vehicle builds. Depending on the vehicle specification and existing modifications, custom adjustments may be required during installation, particularly when used alongside aftermarket intake systems, intercoolers, boost pipework, and other performance upgrades.

Installation of this manifold requires modifications to the exhaust system, intake system, engine water pipework, and turbocharger hoses.

GMC Racing recommends replacing the water hose gasket with Fiat part number 71776601, which is available separately on our website.

Due to the nature of this product and the wide variety of modifications found on the Abarth platform, installation requirements may vary from vehicle to vehicle.

This product is intended for motorsport and off-road use where applicable. It is the customer's responsibility to ensure compliance with local vehicle regulations and emissions requirements.

Photos are for illustration purposes only.