O.S. Engine OS4A407040 Pulse Spacer for GGT10 Engine  [OS4A407040]

Exhaust pulse spacer for glow engines

This O.S. Engine pulse spacer is an RC engine accessory that fits between the engine mounting or exhaust flange and the rest of the manifold assembly. It is made to let builders refine pulse characteristics on glow or nitro model engines by altering how pressure waves meet the exhaust and intake on small R/C engines.

Fitting is simple for anyone used to mounting model engines: position the spacer at the exhaust or mounting flange, secure with the existing engine fasteners, and check alignment and sealing. No specialist tools are required beyond the common hex driver set used for engine mount hardware; always inspect flange fit and gasket condition before final torque.

In use, the spacer changes the timing and intensity of pressure pulses at the exhaust and intake interfaces, which can shift throttle response and widen or narrow the engine's tuning window. Approach changes one step at a time and log outcomes so you can measure the spacer's real effect on your model.