Experience noticeable power gains, an awesome sound, and aggressive yet discrete styling. Manufactured since 1983 in the UK from premium T304L aircraft-grade stainless steel, chosen for its superior quality and anti-magnetic properties, every system ensures ultimate performance and a sharper throttle response through features like mandrel-bent, full-flow pipework.
Milltek’s performance stainless steel exhausts offer genuine power gains, an exhilarating sound, and a significant improvement in driveability and throttle response.
Key Features & Advantages:
- Premium Material: Manufactured from anti-magnetic, non-discoloring Type T304L aircraft-grade stainless steel for superior quality throughout all pipework and silencers.
- Optimised Flow: Increased bore size and mandrel-bent, full-flow pipework ensure ultimate performance without sacrificing mid-range torque.
- Proven Expertise: Over 40 years of continuous development, with all systems designed, developed, and manufactured in the UK since 1983.
- Weight Saving: Substantial weight reduction over original equipment.
- Comprehensive Range: Systems include cat-back, GPF/OPF-back, sports cats, de-cats, and more.
Need fitting guidance for your exhaust system, call +44 (0)1789 774444 or contact us directly.
Find your next Seat Leon Cupra Leon Mk4 Hatch 300ps (OPF/GPF Equipped) Exhaust System
| SKU | Product Type | Additional Options | Notes | Pipe MM | Pipe Inches | EC Approved | Race System |
|---|---|---|---|---|---|---|---|
| MILLTEK1446-A | Large Bore Downpipe and Hi-Flow Sports Cat | 94mm / 3.7inch ID Turbo Outlet to 80mm / 3.15inch Downpipe with 200CPSI HJS Cat includes OPF/GPF Bypass (Milltek System Only) | Fits with Milltek OPF/GPF Back System Only – Requires stage 2 ECU software | 94.0 | 3.7 | X | Y |
| MILLTEK1446-B | Large Bore Downpipe and Hi-Flow Sports Cat | 94mm / 3.7inch ID Turbo Outlet to 80mm / 3.15inch Downpipe with 200CPSI HJS Cat includes OPF/GPF Bypass (OE System) | Fits with OE OPF/GPF Back System Only – Requires stage 2 ECU software | 94.0 | 3.7 | X | Y |
| MILLTEK1446-C | Large Bore Downpipe and Hi-Flow Sports Cat | 94mm / 3.7inch ID Turbo Outlet to 80mm / 3.15inch Downpipe with 200CPSI Race Cat includes OPF/GPF Bypass (Milltek Back System Only) | Fits with Milltek OPF/GPF Back System Only – Requires stage 2 ECU software | 94.0 | 3.7 | X | Y |
| MILLTEK1446-D | Large Bore Downpipe and Hi-Flow Sports Cat | 94mm / 3.7inch ID Turbo Outlet to 80mm / 3.15inch Downpipe with 200CPSI Race Cat includes OPF/GPF Bypass (OE System) | Fits with OE OPF/GPF Back System Only – Requires stage 2 ECU software | 94.0 | 3.7 | X | Y |
| MILLTEK1446-E | Particulate Filter-back | 80mm OPF/GPF Back System (Non Resonated – Louder) – Fits to OE Tips | 80.0 | 3.15 | X | X | |
| MILLTEK1446-F | Particulate Filter-back | 80mm OPF/GPF Back System (Non Resonated – Louder) – Quad Cerakote Black Ovals (Require Trimming of Plastic Rear Diffuser) | 80.0 | 3.15 | X | X | |
| MILLTEK1446-G | Particulate Filter-back | 80mm OPF/GPF Back System (Non Resonated – Louder) – Quad Polished Ovals (Require Trimming of Plastic Rear Diffuser) | 80.0 | 3.15 | X | X | |
| MILLTEK1446-H | Particulate Filter-back | 80mm OPF/GPF Back System (Resonated) – Fits to OE Tips – ECE Approved | 80.0 | 3.15 | Y | X | |
| MILLTEK1446-I | Particulate Filter-back | 80mm OPF/GPF Back System (Resonated) – Quad Cerakote Black Ovals (Require Trimming of Plastic Rear Diffuser) – ECE Approved | 80.0 | 3.15 | Y | X | |
| MILLTEK1446-J | Particulate Filter-back | 80mm OPF/GPF Back System (Resonated) – Quad Polished Ovals (Require Trimming of Plastic Rear Diffuser) – ECE Approved | 80.0 | 3.15 | Y | X |
