CMS Performance Sub Strap Mount for Porsche Carbon Bucket Seat

2026-02-17T09:24:08-05:00

Vendor: Competition Motorsports
Type: Interior
Price: 249.00 - 449.00 (2 variants)

Designed to Fit

981 GT4

718 GT4/GT4 RS

991 GT3/GT3 RS

992.1 GT3/GT3RS

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.

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