2025 GT Cup Season Guide

GROUPS There will be six (6) groups defined by original manufacturer stated specifications comprising of GTO Open specification cars from the following : • Cars built by very low volume manufacturers (max 50 cars) • Cars built to GTE and GT2 specification • Cars that are not derived from universally recognised volume GT car manufacturers • Cars that were built to FIA GT3 specification but are no longer current. GT3 For current FIA homologated GT cars running to the manufacturers GT3 specifications as per the FIA Homologation papers GTC Current and later (within the last 5 years) model year Manufacturer Challenge and Cup specification cars. These cars MUST comply with current manufacturer Challenge Regulations and specifications GTB Earlier year (older than 5 years) Manufacturer Challenge and Cup cars. Modified saloon based GT vehicles from Challenge and Cup series GTH For currently homologated GT cars running to the manufacturers GT4 specification and meeting manufacturer homologation for the make and model entered. GTA Lower specification Cup, Challenge, one make series GT cars and cars built to meet GT4 specification but which are no longer valid. NOTE: 1. The organisers reserve the right to amalgamate any groups that do not have enough entries for them to run separately into a group that is of the same or similar performance. This will be communicated to competitors before the start of the season via the Championship Notice Board and by e-mail. The entries will then be balanced for performance via the official BUTE Motorsport Balance of Performance for each round and all points scored will count towards the amalgamated class and overall championship. 2. All cars are also subject to the maximum power to weight ratio for their respective group. 3. ALL cars must run in accordance with the Balance of Performance document issued by the Championship organisers prior to each meeting. PIRELLI TYRES The 2025 season marks Pirelli’s sixteenth year as the official tyre supplier for the GT Cup Championship. Renowned for their commitment to performance and reliability, Pirelli provides a comprehensive range of slick and wet tyres tailored to the diverse array of machinery competing in the series. To promote cost efficiency while maintaining competitive standards, teams are limited to three sets of slick tyres per weekend. Tyres may also be heated prior to use, ensuring optimal performance on the track. Pirelli’s enduring partnership underscores their dedication to supporting the GT Cup and its competitors, ensuring a premium racing experience for all. 7