BMP BMW N54 N55 S55 1/2 inch Phenolic Intake Manifold Spacer - Thermal Barrier, O-Ring Sealed - Fits 135i 335i 435i 535i 640i 740i M135i M2 M235i M3 M4 X1 X3 X4 X5 X6 Z4 (501-0081)

BMW N54 N55 S55 Inlet Manifold Insulator Plate 1/2 inch by BMP - Part No. 501-0081

Chase cooler charge temps and rock-solid performance with BMP’s 1/2 inch inlet manifold heat isolator for BMW’s turbo straight-six engines. This precision spacer sits between the cylinder head and the plenum to interrupt heat soak, helping your boosted BMW run more consistently on the road, track day or strip. We have installed this unit on numerous customer cars and our own builds, and feedback has been outstanding for reliability, sealing and real-world temperature control.

Why this heat isolator is a smart upgrade

• Thermal barrier between head and plenum helps keep intake hardware cooler
• Supports lower charge temperatures for more stable performance under sustained boost
• Improves knock resistance for safer running when pushing on
• Reuses factory-style rubber seals for a clean, airtight fit
• Ideal for spirited road driving, track work and high-power builds

Technical details

• Thickness: 0.5 inch canvas phenolic composite for maximum thermal isolation
• Seal interface: O-ring equipped, designed to accept OEM-style manifold seals
• Rockwell hardness: 100 for dimensional stability
• Thermal conductivity: 2.03 to minimise heat transfer into the inlet runners
• Often fits metal performance plenums without stud extensions, including all BMP manifolds
• Weight: 0.65 lbs
• Part number: 501-0081

What you get

• 1 x 1/2 inch phenolic manifold spacer plate
• 6 x O-ring seals

Need extra seals or hardware for your setup? Get in touch and we will help specify what is required for your manifold.

Engine and model coverage

For BMW turbo six-cylinder applications using N54, N55 and S55 engines, including but not limited to:

• 135i 2007 to 2013 - 135is 2013 - 1M 2011 - M135i 2013 to 2016
• 335i 2006 to 2015 - 335i GT xDrive 2014 to 2016 - 335i xDrive 2009 to 2015 - 335is 2011 to 2013 - 335xi 2007 to 2008
• 435i 2014 to 2016 - 435i Gran Coupe 2015 to 2016 - 435i xDrive 2014 to 2016
• 535i 2008 to 2017 - 535i GT 2011 to 2017 - 535i GT xDrive 2011 to 2017 - 535i xDrive 2009 to 2016
• 640i 2012 to 2018 - 640i Gran Coupe 2013 to 2017 - 640i xDrive 2014 to 2017 - 640i xDrive Gran Coupe 2014 to 2017
• 740i 2011 to 2015 - 740Li 2011 to 2015 - 740Li xDrive 2013 to 2015
• ActiveHybrid 3 2013 to 2015
• M2 2016 to 2020 - M235i 2014 to 2016 - M235i xDrive 2015 to 2016
• M3 2015 to 2018 - M4 2015 to 2020
• X1 2013 to 2015 - X3 2011 to 2017 - X4 2015 to 2016 and 2017 to 2018
• X5 2011 to 2018 - X6 2008 to 2017
• Z4 2009 to 2014

Common chassis searches: E82, E88, E90, E92, E93, F20, F21, F22, F30, F31, F32, F33, F36, F10, F06, F12, F13, F80, F82, F83, E84, F25, F26, F15, E71, E89.

Installation and support

Professional fitting recommended. For installation in the UK, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk and our team will advise on seals and stud lengths for your specific plenum.

Compatibility check

We verify fitment before dispatch. Please provide your UK registration or the last 7 of the VIN at checkout.

Manufacturer

BMP

Why buy from us

We have installed these insulators across multiple N54, N55 and S55 builds with excellent customer feedback on heat management and sealing integrity. Easy to fit, dependable, and a brilliant supporting mod for tuned turbo BMWs looking for consistent performance on hot days.

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