Jaguar Mkx 3.8 4.2 420g Exhaust System

Model years from: 01/01/1961

Model years to: 12/31/1970

The Jaguar Mkx 3.8 4.2 420g is more than a classic , it’s a driving statement. Our handcrafted stainless steel exhaust system is built to honour and enhance its iconic presence.

Each exhaust is hand-built in the UK, shaped specifically for the Jaguar Mkx 3.8 4.2 420g with immaculate attention to fit, sound, and finish. Built from premium-grade stainless steel, it offers lasting protection against corrosion while enhancing the car’s original tone.

The result is a driving experience that feels more alive , with improved gas flow, reduced backpressure, and a tone that’s deeper yet never overwhelming. You’ll feel the difference in every gear.

Every Jaguar Mkx 3.8 4.2 420g carries a sense of occasion , a reminder of an era when driving was more than transport; it was style, statement, and engineering pride. This system adds depth to that experience without overshadowing its originality.

Beyond its visual appeal, this upgrade represents a commitment to preservation , it’s about keeping your Jaguar Mkx 3.8 4.2 420g not just running, but thriving in today’s world of modern roads and expectations.

Please note: Images shown are representative of Paramount Performance craftsmanship and may not reflect the exact configuration for your Jaguar Mkx 3.8 4.2 420g. Please contact us to confirm compatibility.

Additional information

Product & Manufacturing Details
• Handmade in Great Britain – All classic car exhaust systems and manifolds are crafted to order in our UK workshop.
• Premium 304 Stainless Steel – Each performance exhaust system is built from exceptional-quality 304 grade stainless steel, chosen for its strength, corrosion resistance, and long-term durability. Where required, mild steel flanges are used for precise vehicle-specific fitment.
• Built to Order – These bespoke exhaust systems are not held in stock. Please allow up to four weeks for manufacturing, plus delivery time. We will keep you informed throughout the build process and provide detailed shipping updates.

Warranty & Guarantee
• Two-Year Manufacturer’s Guarantee – Covers workmanship and manufacturing defects.
• Lifetime Corrosion Warranty – Protects against perforation caused by corrosion, provided the system remains unmodified from the manufacturer’s specifications.
• Defects Process – Any suspected defect will be assessed by the manufacturer, who will determine whether repair or replacement is appropriate under warranty.
• Non-Refundable Policy – Custom-made and bespoke exhaust systems are non-refundable once fitted, except where covered by the above guarantees.

Returns & Refunds
• Items ordered or shipped in error by us will be refunded or replaced with the correct parts.
• Parts ordered in error by the customer are not refundable.
• Stock items returned are subject to a return shipping fee and a re-stocking fee (currently 15%).
• Damaged deliveries must be signed for as damaged or refused and reported to us immediately.
• Parts with a manufacturing defect will be covered under the manufacturer’s warranty; bespoke and custom-built exhaust systems are not eligible for refunds.

Mail-Order & Specially Ordered Items
• Specially ordered or custom-built exhaust systems must be paid in full before manufacturing begins.
• Mail-order exhaust parts and accessories must be paid in full before despatch.

Onsite Works & Project Vehicles: Fitment and Installation
• You may retain original vehicle parts removed during fitting. This must be agreed and documented on the Workshop Job Card.
• Retained parts must be collected within 7 business days; otherwise, they will be disposed of without further notice.