VW Golf (Mk4) 1.4 & 1.6 (1J) (98-04) Cat Back Performance Exhaust

Volkswagen Golf Mk4 1J 1.4 and 1.6 Catback System – sound upgrade, sharper response, easy bolt-on fit

Transform your Mk4 driving experience with a quality catback system designed specifically for the Volkswagen Golf 1J chassis. This rear section upgrade replaces the centre and back box to unlock a deeper tone, crisper throttle response and a properly sporty soundtrack without drone. Perfect for daily use or weekend builds, this is the exhaust upgrade enthusiasts choose for the 1.4 and 1.6 petrol models from 1998 to 2004.

We run this setup on our own projects at MJ Modifications and our customers love the refined note on the resonated option and the louder, more aggressive character of the non-resonated version. It is a direct fit to the factory catalyst, supplied with the required clamps and gaskets for a straightforward installation.

Key features

• Pipework diameter: 2.5 inch / 63.5 mm for improved flow on the 1.4 and 1.6 petrol engines
• Cat-back layout – connects from the OEM catalytic converter rearwards
• Choice of sound level:
  • Resonated – includes centre silencer for a subtle, sporty tone
  • Non-resonated – centre silencer delete for a louder, sharper exhaust note
• Supplied with all relevant fittings and gaskets for a proper bolt-on install
• Designed for the 1J platform for a clean, factory-like fitment

Fitment and compatibility

Suitable for: Volkswagen Golf Mk4 1J, 1.4 and 1.6 petrol, model years 1998, 1999, 2000, 2001, 2002, 2003 and 2004. Replaces the centre section and rear silencer assembly while retaining the standard catalytic converter.

Sound and drivability

Resonated systems keep cabin comfort on long runs while adding a deeper burble at idle and a fuller tone under load. Non-resonated systems remove the centre silencer for a more pronounced volume and a sportier character. Both options are engineered to reduce restriction compared to a tired factory system and to let the engine breathe more freely.

Why enthusiasts choose this upgrade

• Golf Mk4 1.4 exhaust upgrade with a genuine performance feel
• Golf Mk4 1.6 catback for a purposeful, motorsport-inspired note
• Direct replacement centre and back box for 1J chassis cars
• Great match for OEM or mild tuning, induction kits and remaps
• Aftermarket tailpipe sound upgrade without compromising daily usability

Installation and fitting

Professional fitting is recommended. Book your install with MJ Modifications in Warwickshire – request a quote at info@mjmodifications.co.uk.

Notes

• Your vehicle may require the 4Motion rear valance for the tailpipe cutout. OEM VW part number: 1J6807521C.
• Some product images may show the non-resonated setup.

Media

Hear the system and see it on-car.

Search-friendly terms to help you find the right kit

Volkswagen Golf Mk4 exhaust system, Mk4 Golf 1.4 catback, Mk4 Golf 1.6 sports exhaust, 1J chassis exhaust upgrade, Golf 1998-2004 centre section and back box, 63.5 mm performance system, tailpipe sound upgrade, bolt-on kit with gaskets and clamps, UK aftermarket Golf exhaust.