Turner Motorsport S54 Silicone Intake Boots / Throttle Body Couplers / Hoses (TB to Plenum) – Set of 6 with Clamps | BMW E46 M3 & Z4 M | OE-Style 3‑Ply, CSL Airbox Compatible (ES4135389)

S54 Intake Coupler Kit for BMW M Engines. Premium silicone, proper fit, clamps included

Your high-revving S54 deserves airtight intake plumbing. If the original rubber couplings between the throttle bodies and the plenum have gone hard, cracked or oil-soaked, this upgraded silicone coupler set restores a perfect seal and reliable performance on road or track. Ideal for E46 M3 and Z4 M owners looking to eliminate intake leaks and keep fuelling trims in check.

This Turner kit is engineered for factory-style fitment with the correct internal profiles to match the OE geometry. It is not a generic reducer. Three-ply construction offers durable heat resistance and longevity under continuous heat cycling, vibration and even boosted applications. Screw-style clamp friendly. This package includes the clamps for a complete install.

• Direct replacement intake couplers for the BMW S54 intake manifold to plenum junction
• Three-ply silicone construction for strength and heat resilience
• Designed with OE-style internal features for smooth airflow and correct seating
• Track day proven and suitable for forced induction builds
• Includes screw-style clamps for all six inlets for a hassle-free installation
• Great value. Less than half the price of genuine OEM rubber pieces
• Set of six to renew the entire bank of throttle connections
• Works with standard US plenum and CSL-style airbox, including OE-style replica plenums

We use this kit on our own S54 builds and customer cars. Feedback has been consistently excellent with smoother idle quality, reduced unmetered air issues and long-term reliability compared to ageing factory rubber.

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What is included

• Six silicone intake couplers for the S54 throttle body to plenum interface
• Matching screw-style clamps for each connection

Part number: ES4135389

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote or advice.