CS Series Exhaust for LC135 Model available: LC135 4S & 5S Size available: 28mm & 32mm ✅ Design to improve airflow and sound. ✅ Increase engine response and performance. ✅ Stainless steel manifold with O2 sensor mounting. ✅ Slip-on design help to prevent cracking the exhaust pipe. Compatible: For standard & modified engine.