The S3 Extrem cylinder head for Gas Gas EC/MC 250 is a part designed for extreme riding and technical areas. Its geometry modifies the compression to provide a smoother and more progressive power delivery, enhancing engine control and better throttle modulation. Designed to improve traction when the terrain gets challenging, it helps to smooth out the response at the wrist without disrupting the original mapping.

• Brand: S3
• Category: Cylinder Head
• Color: Aluminum
• Noted Effects: better control in low and mid-range RPM, reduction of hot spots thanks to optimized thermal design
• Kit Contents: cylinder head, choice of insert, and O-rings

Designed for motocross and off-road enthusiasts seeking better engine feel in technical sections, this S3 cylinder head retains the original interfaces for a clean integration on compatible blocks. It does not promise miraculous figures but provides a real advantage in handling when managing grip and acceleration in demanding conditions.

Manufacturer Reference: XTR-985TPI-250-R — Compatible notably with GAS GAS MC 250 (2022/2023) and GAS GAS EC 250 (2023).