GPR Exhaust - Pentacross Full Titanium Full Line for Yamaha WR 250 F - 2015 to 2019 K-Type-Loading Guides some of the photos show

some of the photos show the weight ring attached to the stock rotor (stock rotor not included)

high-quality powder coating

The JIMS tappet roller is the only one of its kind and we can virtually guarantee the exclusive use of them will eliminate the problem of needle rollers and pieces damaging the engine

and extremely robust

Scratch-resistant and robust

GPR Exhaust - Pentacross Full Titanium Full Line for Yamaha WR 250 F - 2015 to 2019 K-Type-Loading Guides some of the photos showThis is a GPR's FULL TITANIUM complete racing system for track use developed in collaboration with the best MXGP teams. The kit consists of a manifold with Ultrabomb expansion and new Pentacross silencers. The manifold and silencers are titanium made, this system produces an average performance increase of 2cv. FEATURES SOUND: Upgraded sound from stock exhaust PERFORMANCE: Upgraded performance from stock exhaust QUALITY: Italian made with high grade