Tuned pipe, resonator, r.o.a.r. legal (dual-chamber, enhances mid to high-rpm power) (for revo with trx racing engines)

Tuned pipe, resonator, r.o.a.r. legal (dual-chamber, enhances mid to high-rpm power) (for revo with trx racing engines)

Tuned pipe, resonator, r.o.a.r. legal (dual-chamber, enhances mid to high-rpm power) (for revo with trx racing engines)