Powerflex Track Upper Engine Mount Insert Kit - F40 (2018 - ) 1 Series - PFF5-1321BLK

Top Motor Mount Poly Insert for BMW F40 2018 onwards - Part No. PFF5-1321BLK

Stiffen your drivetrain and sharpen your throttle response with this high-performance polyurethane top mount insert designed for the BMW F40 platform. Crafted in a 95 Shore A Black Series compound, this rod-style poly bush fills the factory voids in the OE mount to reduce fore-aft movement, tame engine rock and deliver a tighter, more connected driving feel without sacrificing everyday usability.

Ideal for cars pushing beyond stock output, especially 2.0-litre turbo builds where ageing rubber bushes can crack and allow excessive movement. Expect crisper gearchanges, reduced wheel hop under hard launches, improved on–off throttle stability and a more settled transmission response during acceleration and deceleration.

Why upgrade your top mount bush

• Reduces engine roll and torque-induced movement for cleaner power delivery
• Improves shift feel and driveline engagement
• Helps cut wheel hop and tramp for better traction
• Prolongs the life of the original mount by supporting the rubber
• Durable 95A Black Series polyurethane for track-capable control
• Suitable for daily-driven cars seeking a balanced NVH compromise

We have installed this insert on customer cars and in our own builds. Feedback is consistently positive, noting a more precise drivetrain, stronger launches and a more confidence-inspiring shift action.

Key details

• Part number: PFF5-1321BLK
• Material: Black Series polyurethane, 95A durometer
• Design: Effective rod-style insert that fills OE voids
• Pack contents: 1 insert
• Diagram reference: 21
• Recommended use: Performance road, track days and motorsport

Compatible OE references

Directly supports and complements OE mount housings associated with the following references:

• 22116853446
• 22116875630
• 22116875628
• 22118743621

Fitment and installation

Professional installation is recommended to ensure correct seating and optimal results. For fitting, choose MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW F40 engine mount insert, top motor mount bushing, poly mount upgrade, drivetrain stabiliser bush, anti wheel hop insert, 95A polyurethane bush, performance engine mount for BMW 1 Series F40, torque mount insert, transmission stability upgrade, Black Series poly bush.

Note: Please check diagram reference 21 to confirm the location of this insert on your vehicle.