CMS Performance Sub Strap Mount for Porsche Carbon Bucket Seats is built for track and competition cockpit setups where shell design, driver containment, mounting compatibility, and approval details matter. Review the preserved manufacturer specifications below for sizing, construction, homologation, and mounting notes before purchase.

PMB Performance added this context so customers can compare the seat against their chassis, brackets, harness setup, and intended use without removing the original manufacturer graphics or specs.

CMS Performance Sub Strap Mount for Porsche Lightweight Carbon Bucket Seats

This Product Fits the Following Cars:

• 992 GT3/GT3RS
• 991.1 & 991.2 GT3/GT3RS
• 991.2 GT2RS
• 981 Cayman GT4
• 718 Cayman GT4
• 718 Cayman GT4RS

The Best Way to Install Sub Straps in Your Porsche

The CMS Performance Sub Strap Mount is a must-have for Porsche GT2RS, GT3/GT3RS, and GT4 owners using five-, six-, or seven-point harnesses with the factory CFRP Full Bucket Seats (also called Light Weight Bucket seats). Designed to easily bolt in using existing seat hardware without having to fully remove the seats from the car, the CMS Performance Sub Strap Mount properly anchors your harness anti-submarine straps ("sub straps") to your seat base.

The CMS Performance Sub Strap Mount fits the driver- and/or passenger-side seats.

See installation instructions here

Proudly Made in the USA

CMS Performance Sub Strap Mounts are designed, manufactured, and powder-coated entirely in-house in the USA. Made of solid carbon steel while only weighing 1.4 lbs (625g), there's not a stronger, more affordable solution available. CMS Sub Strap Mounts allow full seat adjustment, fore/aft and up/down, while maintaining the ideal sub strap angle to your body for maximum safety.

Each CMS Performance Sub Strap Mount is powder coated a durable, silky-smooth satin black.

CMS Performance Sub Strap Mount Details

• Solid steel construction for maximum safety
• Allows full fore/aft and up/down seat adjustment
• Powder-coated satin black
• Fits driver or passenger seat (Porsche Carbon LWB only)
• Simple to install
• Compatible with OEM seat belt and airbag hardware