BMW 420D (F32/F33/F36) (13-20) Quad Exit M4 Style Performance Exhaust Conversion

BMW 4 Series 420d F32 F33 F36 Quad Tailpipe M4 Look Conversion with Rear Valance

Give your BMW 4 Series diesel the aggressive M4-inspired rear end it deserves. This centre to rear stainless system delivers a tasteful OEM plus tone and stunning quad tailpipes, complete with a matching lower diffuser for M Sport bumpers. It is the go-to quad outlet upgrade for F32 Coupe, F33 Convertible and F36 Gran Coupe owners who want premium build quality, razor-sharp fitment and a head-turning finish.

Key reasons enthusiasts choose this quad tailpipe setup

• M4 look conversion with four slash cut tips for a motorsport-inspired finish
• Transforms the rear profile with the supplied interchangeable lower rear panel, designed for M Sport bumpers
• Refined sound, subtle increase over stock for daily-friendly driving
• T304 grade stainless construction with precise TIG-welds for long-term durability
• Mandrel bent 63.5 mm pipework from centre section back for smooth flow
• All required fittings and gaskets included, rear valance included
• Fully guaranteed by the manufacturer for peace of mind

Fitment and compatibility

• BMW 420d B47 engine models, 2013 to 2020 including LCI
• F32 Coupe, F33 Cabriolet, F36 Gran Coupe with M Sport styling
• Supplied quad exit lower rear panel must be fitted, included in the kit
• Compatible with vehicles equipped with a factory tow bar
• Not suitable for AdBlue equipped variants

Specification and construction

• Centre and rear section replacement that removes the standard single exit rear section
• Pipe diameter 2.5 inch, 63.5 mm mandrel bent tubing
• Four aggressive slash cut tailpipes for a balanced left and right exit
• Crafted in the UK with expert TIG welding for an exceptional finish

Sound and everyday usability

This is a cosmetic-focused exhaust conversion aimed at enhancing the styling and rear presence of your 420d. The tone offers a modest uplift while remaining close to factory volume, ideal for commuting and motorway use without unwanted cabin boom.

Installation information

• The original exhaust pipe requires a cut to install this system
• All clamps, mounts and gaskets are supplied
• Professional fitting recommended

Want it fitted correctly first time? Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Built by UK specialists

Manufactured in Sheffield by renowned exhaust experts using premium T304 stainless and precision TIG welding for an impeccable fit and finish. With decades of experience behind the design and development, this system offers quality you can trust.

What our customers say

We have fitted this conversion for many 4 Series owners and the feedback is consistently positive. Customers love the OEM style integration of the new diffuser, the perfect tip alignment and the sharper sporty tone.

Ideal search terms

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