S3 High Compression Gas TRS Cylinder headRef : SPART00266A / 1011526

Manufacturer reference: ST-GG-IN-300 A

The S3 High-compression cylinder head for Gas Gas / TRS is an insert designed for trial and cross riders who wish to modify engine behavior without heavy intervention. Designed to increase the compression ratio, this insert redefines the feel of the throttle by providing a more responsive engine and better grip when demanding low revs.

• Improves engine traction and precision of throttle response.
• Optimized internal design for more homogeneous combustion and management of hot spots.
• Tuning of engine character: more dynamic without compromising handling in technical riding.

Used on 300 cc machines (notably the GAS GAS TXT 300 Racing, TXT Pro 300 Racing, and TXT Pro 300 Replica models), this high compression insert (A) is aimed at riders looking for a more "lively" bike in the low and mid-range while maintaining good progression. S3 offers several levels of inserts (STD, A, AA, AAA, low compression) to adapt engine behavior according to altitude, preparation, or riding style. Professional installation is recommended to maintain the appropriate ignition and injection/carburation settings.