373-1991: VALVE GP-RLF
373-1996: VALVE GP-SOL
20R-3467: Cat® G3306 Reman Upgrade-to-New (UTN) Cylinder Head
373-1997: VALVE GP-SOL
20R-3540: Cat® Reman D3500 Cylinder Head
373-1998: VALVE-CHECK
20R-3541: Cat® Reman D3500 Cylinder Head
20R-3542: Cat® D3500 Reman Cylinder Head
373-4539: VALVE GP-D R
20R-3543: Cat® D3500B Reman Cylinder Head
373-4540: VALVE GP-D R
20R-3544: Cat® D3500B Reman Cylinder Head
