Zeppin Racing would like to introduce the new 2 chambers exhaust system for .21 off road engines, the “Thunder ZR-1″

Dual Chamber and stringer reinforced support. Designed for in mind for high toque while maintain great top speed. So far, we have great feedback from testing for the benefit of more responsive power band, faster spool up and improve fuel consumption.

Package including exhaust manifold, gaskets, mounting springs.