LOWER COVER ASSEMBLY SET FOR C3W DISTRIBUTOR VALVE ( MODIFIED ) CONFORMING TO RDSO SPEC. 02- ABR- 02 WITH AMEND. NO. 4, ( LAST AMENDMENT- 4 OF SEPT. 2016 ), APPENDIX % u2013A1 TO FTRTIL PART NO 501102200 OR SIMILAR. FULL DESCRIPTION AND FTRTIL PART NOS. AS PER ENCLOSURE.