CMS Performance Harness Install Kit – 2023-2026 Toyota GR Corolla

CMS Performance Harness Install Kit — 2023-2026 Toyota GR Corolla

The CMS Performance Harness Install Kit for the 2023-2026 Toyota GR Corolla provides two strong, secure lap belt anchor points using the factory seat mounting hardware. No drilling, cutting, or permanent modification required. CNC machined from 1/4-inch solid carbon steel, fully TIG welded through 360 degrees, and satin black powder coated in-house by CMS Performance in the USA. Available as a single-seat kit or as a pair — select from the dropdown when ordering.

DETAILS

• Platform: 2023-2026 Toyota GR Corolla GZEA14
• Single or pair options available — select from dropdown
• Bolts to factory rear seat mounting points using original seat mounting bolts
• No drilling, cutting, or permanent modification to the vehicle
• CNC machined from 1/4-inch solid carbon steel — fully TIG welded through 360 degrees
• Satin black powder coat — nearly invisible once installed beneath the seat
• Full fore/aft and up/down seat adjustment maintained
• Does not interfere with OEM seat belts or airbag hardware
• Designed, built, and powder coated in USA by CMS Performance
• For off-road use only

No-Drill Harness Lap Belt Anchors Using Factory Seat Mounting Points

The CMS Performance Harness Install Kit uses factory seat mounting hardware to create secure lap belt anchor points without drilling, cutting, or modifying the vehicle. The kit bolts to the rear mounting points of the driver or passenger seat, beneath the seat slider tracks, using the original seat mounting bolts. The mounting structure is CNC machined from 1/4-inch solid carbon steel and fully TIG welded through 360 degrees, providing a strong anchor that does not interfere with seat fore/aft or up/down adjustment.

CNC Carbon Steel Construction, Full Seat Adjustment, and Reversibility

CMS recommends the Schroth Profi II ASM Harness for use with this kit in the GR Corolla. Schroth’s Anti-Submarine (ASM) technology was developed specifically for street cars that do not have a seat cushion pass-through for a six-point harness sub strap — the ASM design is correct for the GR Corolla’s factory seat geometry. The kit installs in approximately one hour, is completely reversible, and leaves no trace on the vehicle when removed. For off-road use only.

What’s in the Box

• CMS Performance Harness Install Kit
• Installation instructions

Why Choose Competition Motorsport

Competition Motorsport designs and manufactures roll bars, seat delete panels, and harness hardware for track-prepared and street-driven sports cars from their facility in the USA. Every CMS roll bar is built from Docol R8 Advanced High-Strength Steel — 15% stronger than 4130 CrMo and 30% stronger than mild (DOM) steel used by other manufacturers — and is TIG welded through 360 degrees at every joint. CMS products bolt directly to factory chassis mounting points without cutting, drilling, or welding on the car. Custom powder coating in factory-matched paint colors sets CMS apart from manufacturers who offer only generic black, white, or red. RallySport Direct stocks Competition Motorsport products because the quality of their domestic manufacturing and the thoughtfulness of their fitment engineering produce hardware we are confident recommending for track-day and time attack builds.

The RallySport Take

The CMS Harness Install Kit for the GR Corolla is the practical solution for owners who want to use a racing harness on track days without permanently modifying the car. Factory seats stay in place, anchors install in roughly an hour, and the car can return to street use by removing the harness. Combined with the CMS Roll Bar, this is the complete harness hardware foundation for GR Corolla track preparation.

Fitment

Year	Make	Model	Notes
2023-2026	Toyota	GR Corolla	GZEA14 — all trims