Samsonas Motorsport Group A & Standard Gearkit for BMW M3 E30 (Getrag 265)

Product Overview

The Samsonas Motorsport Gearkit for the BMW M3 E30 is the ultimate transmission upgrade for Historic Rally, Touring Car, and Circuit racing. Engineered to replace the internals of the standard Getrag 265/5 and 265/6 gearboxes, this kit converts your transmission into a robust, straight-cut dogbox while retaining the original housing for compliance with historic regulations1.

Key Features & Engineering

• High-Strength Materials: Clutch shaft manufactured from special driveshaft steel; gears feature new surface profiles with big teeth for maximum durability2.

• Minimum Rolling Resistance: Full straight-cut gear design to reduce friction and power loss3.

• Surface Treatment: All gears and internals are super-finished and shot-peened for extended fatigue life4.

• Reliability: Selectors, shifting fingers, protections, forks, and rods are machined from billet steel, ensuring precise shifting under extreme load5.

• Group A Homologation: Specific options available to match FIA Group A homologation papers for both Touring and Rally disciplines66.

Available Configurations (Variants)

You can choose from three distinct specifications based on your racing discipline:

1. 5 Speed Group A (Touring): Designed for the Getrag 265/5 housing. Authentic Group A ratios for circuit/touring applications7777.

2. 6 Speed Group A (Rally): Designed for the Getrag 265/5 housing. Homologated ratios optimized for rally stages8888.

3. 6 Speed Standard: A non-homologated 6-speed option offering a versatile ratio set for Time Attack, Hill Climb, or open-class racing9999.

Technical Ratios

[Data Source: Samsonas BMW E30 EU.pdf, Page 1 - Gearkit Ratios Table] 10

Applications

• Rally & Rally Cross 11111111

• Circuit & Touring Car (Group A) 12

• Hill Climb 13

• Endurance Racing 14

• Time Attack 15

Note: This is a gear kit (internals only). It requires an original OEM Getrag 265 gearbox casing for assembly. Professional assembly is recommended.