Carbon fibre Used once on my cbr 1000rr but decided to use akra instead. Bought out of impulse from the website at 440 euros(670~sgd) plus shipping(100+) This exhaust has not been used ever since. Just the end cap so you need to find the link pipe for your bike. Fits almost any bike. Also no cert for obvious reasons. MotorGP exhaust. Very loud and bassy. Really had a lot of fun the first time using it. Price further reduction to 350. Urgent sale.