470     1

designed for high-horsepower builds and maximum efficiency

steel stone guards are available separately

Rally Road is offering a Limited Lifetime Warranty on this part

- Lowers Intake Air Temps (IATs)

B58 Pro-Xtreme Valve & Valve Spring Kit 330xi 470 1Simplify your next B58 engine build with this all in one Competition Valve & Spring Kit, now available from 5150 AutoSport. Featuring Ferrea's single groove stainless steel valves and a complete high performance valve spring kit, this package eliminates the guessworkgiving engine builders a reliable, track proven solution in a single click. Built for Power. Engineered for RPM. This kit includes standard size Ferrea Competition Plus intake and exhaust