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AR92   DOR 08 TS* DOR 08 IR*     DR 08 ZS* R5724-10   S57YC  
    DOR 08 TS* DOR 08 IR*     DR 08 ZS*        
AR93   DOR 10 TS* DOR 10 IR*   DOR 11 LGS* DR08ZS*/DR10ZS* R5724-9 IT27 S59YC  
    DOR 10 TS* DOR 10 IR*   DOR 11 LGS* DR08ZS*/DR10ZS*        
AR94 DR 12 YS* DOR 12 TS* DOR 12 IR*   DOR 12 LGS* DR 10 ZS* R5724-8 IT24 S61YC  
  DR 12 YS* DOR 12 TS* DOR 12 IR*   DOR 12 LGS* DR 10 ZS*   T22EPR-U    
  DR 14 YS* DOR 14 TS* DOR 14 IR* GOR 14 IRY DOR 14 LGS* GOR 14 LGS BR7EFS IT22 RS7YC TP10B
  DR 14 YS* DOR 14 TS* DOR 14 IR* GOR 14 IRY DOR 14 LGS* GOR 14 LGS TR7IX / BP7EFS T22EPR-U   SF10B
AR103 DR 15 YS* DOR 14 TS* DOR 14 IR* GOR 15 IRY DOR 15 LGS* GOR 15 LGS TR6 / BUR6EFSZ IT20 RS9YC TP10C
  DR 15 YS* DOR 14 TS* DOR 14 IR* GOR 15 IRY DOR 15 LGS* GOR 15 LGS TR6IX / BPR6EFS T20EPR-U   SF10C
AR104 DR 17 YS*       DOR 17 LGS* GOR 17 LGS TR5 / TR4 IT16 RS12YC TP10D
AR764/AR765 DR 17 YS*       DOR 17 LGS* GOR 17 LGS TR55 / TR55VX T16EPR-U   SF10D
                     
                     
            ROR 15 LGS PTR5A-13 PT16VR13 / ITV16   SF534D
            ROR 14 LGS PTR6A-13 PT20VR13 / IVT20   SF534C
                     
* This spark plug is the equvivalent spark plug, but in a gasket type, and can be used on CHEVY LS 1; Z 06 and other applications where    
   cylinder head is designed to accept both, tapered and gasket type spark plugs.          
BRISK PREMIUM LGS - Type spark plugs are not suitable for underpowered (weak) ignition systems where cold start problems or high pressure spark blow-off can occur
BRISK PREMIUM ZS - Type spark plugs require precise air/fuel mixture preparation and high power ignition system for proper operation.    
                     
The information we provide is taken from OE manufacturer (Brisk), as well as the number coding systems from other spark plug manufactures.    
They are strictly used as guidelines only, and the final choice is solely made by the end user. If in doubt, try contacting the local dealer to verify the information too.