Tekno RC TKR1729 Inner Head Button

Tekno RC TKR1729 – Inner Head (21aM/aP/bM)

Product Description:
The TKR1729 is the inner head, or head button, for Tekno RC's Blok .21 competition nitro engines. It sits between the piston and the outer cooling head and shapes the combustion chamber; replacing a worn or damaged head button restores compression and combustion geometry. Compatible with the 21aM, 21aP, and 21bM engines.

Features:

• Forms the combustion chamber above the piston
• Restores compression and combustion geometry
• Compatible with all three Blok engine variants
• Note: not eligible for Tekno's general warranty program

Fits: Tekno Blok 21aM, 21aP, 21bM .21 nitro engines

Includes: 1 inner head (head button)

A key part of restoring a Blok engine's compression during a rebuild.