PART OIL     RACER
NUMBERS DESCRIPTION HOLE LIST    NET
- - - - -
NON-ADJUSTABLE PUSHRODS  
REGULAR 4130 FOR UP TO 400 LBS OPEN SPRING PRESSURE  
NR54A NA REG. 5/16 X .049 BALL/CUP & BALL NO 9.06 6.07
NR54B NA REG. 5/16 X .049 BALL/CUP & BALL  YES 9.38 6.28
 
NR34A NA REG. 3/8 X .042 BALL/CUP & BALL NO 9.06 6.07
NR34B NA REG. 3/8 X .042 BALL/CUP & BALL YES 9.38 6.28
 
HEAT TREATED 4130 FOR UP TO 500 LBS OPEN SPRING PRESSURE  
NH54A NA HT 5/16 X .049 BALL/CUP & BALL NO 11.34 7.60
NH54B NA HT 5/16 X .049 BALL/CUP & BALL YES 11.66 7.81
 
NH34A NA HT 3/8 X .042 BALL/CUP & BALL  NO 12.10 8.11
NH34B NA HT 3/8 X .042 BALL/CUP & BALL YES 12.46 8.35
 
HEAT TREATED 4130 FOR UP TO 700 LBS OPEN SPRING PRESSURE  
NH58A NA HT 5/16 X .083 BALL/CUP & BALL NO 13.90 9.31
NH58B NA HT 5/16 X .083 BALL/CUP & BALL YES 14.22 9.53
CN58C2* NA NIT 5/16 X .083 BALL & BALL GP* YES 15.02 10.06
 
NH36A NA HT 3/8 X 065 BALL/CUP & BALL NO 15.12 10.13
NH36B NA HT 3/8 X 065 BALL/CUP & BALL YES 15.50 10.39
 
NH76A NA HT 7/16 X 065 BALL/CUP & BALL NO 18.50 12.40
NH76B NA HT 7/16 X 065 BALL/CUP & BALL  YES 19.00 12.73
 
HEAT TREATED 4130 CHROMOLY FOR EXTREME SPRING PRESSURES  
NH5116A NA HT 5/16 X .116 BALL/CUP & BALL NO 17.50 11.73
NH5116B NA HT 5/16 X .116 BALL/CUP & BALL YES 19.00 12.73
NH38A NA HT 3/8 X .083 BALL/CUP & BALL NO 16.04 10.75
NH38B NA HT 3/8 X .083 BALL/CUP & BALL YES 16.40 10.99
CN38C2* NA NIT 3/8 X .083 BALL & BALL GP* YES 17.42 11.67
NH312A NA HT 3/8 X .120 BALL/CUP & BALL NO 20.00 13.40
NH312B NA HT 3/8 X .120 BALL/CUP & BALL YES 22.00 14.74
CN312C2* NA NIT 3/8 X .120 BALL & BALL GP* YES 24.00 16.08
NH314A NA HT 3/8 X .145 BALL/CUP & BALL NO 23.00 15.41
NH314B NA HT 3/8 X .145 BALL/CUP & BALL YES 25.00 16.75
 
NH79A NA HT 7/16 X .095 BALL/CUP & BALL NO 20.18 13.52
NH79B NA HT 7/16 X .095 BALL/CUP & BALL YES 20.66 13.84
CN79C2* NA NIT 7/16 X .095 BALL & BALL GP* YES 24.50 16.42
NH712A NA HT 7/16 X .120 BALL/CUP & BALL NO 24.00 16.08
NH712B NA HT 7/16 X .120 BALL/CUP & BALL YES 25.50 17.09
NH716A NA HT 7/16 X .165 BALL/CUP & BALL NO 30.00 20.10
NH716B NA HT 7/16 X .165 BALL/CUP & BALL YES 31.50 21.11
 
NH212A NA HT 1/2 X .120 BALL/CUP &BALL NO 26.00 17.42
NH212B NA HT 1/2 X .120 BALL/CUP &BALL YES 27.50 18.43
NH215A NA HT 1/2 X .156 BALL/CUP &BALL NO 29.00 19.43
NH215B NA HT 1/2 X .156 BALL/CUP &BALL YES 30.50 20.44
NH218A NA HT 1/2 X .188 BALL/CUP &BALL NO 36.00 24.12
NH218B NA HT 1/2 X .188 BALL/CUP &BALL YES 37.50 25.13
*GP=FOR USE WITH GUIDE PLATES  
TAPERED PUSHRODS   
TH38SA 3/8 X .083 SINGLE TAPER TO 5/16 NO 21.84 14.63
TH38DA 3/8 X .083 DUAL TAPER TO 5/16 NO 21.84 14.63
TH38SB 3/8 X .083 SINGLE TAPER TO 5/16 YES 23.38 15.66
TH38DB 3/8 X .083 DUAL TAPER TO 5/16 YES 23.38 15.66
 
TH312SA 3/8 X .120 SINGLE TAPER TO 5/16 NO 34.00 22.78
TH312DA 3/8 X .120 DUAL TAPER TO 5/16 NO 34.00 22.78
TH312SB 3/8 X .120 SINGLE TAPER TO 5/16 YES 34.60 23.18
TH312DB 3/8 X .120 DUAL TAPER TO 5/16 YES 34.60 23.18
TH314SA 3/8 X .145 SINGLE TAPER TO 5/16 NO 37.00 24.79
TH314DA 3/8 X .145 DUAL TAPER TO 5/16 NO 37.00 24.79
TH314SB 3/8 X .145 SINGLE TAPER TO 5/16 YES 38.00 25.46
TH314DB 3/8 X .145 DUAL TAPER TO 5/16 YES 38.00 25.46
 
TH79SA 7/16 X .095 SINGLE TAPER TO 3/8 NO 34.04 22.81
TH79DA 7/16 X .095 DUAL TAPER TO 3/8 NO 34.04 22.81
TH79SB 7/16 X .095 SINGLE TAPER TO 3/8 YES 34.62 23.20
TH79DB 7/16 X .095 DUAL TAPER TO 3/8 YES 34.62 23.20
 
TH712SA 7/16 X .120 SINGLE TAPER TO 3/8 NO 37.00 24.79
TH712DA 7/16 X .120 DUAL TAPER TO 3/8 NO 37.00 24.79
TH712SB 7/16 X .120 SINGLE TAPER TO 3/8 YES 37.62 25.21
TH712DB 7/16 X .120 DUAL TAPER TO 3/8 YES 37.62 25.21
 
TH716SA 7/16 X .165 SINGLE TAPER TO 3/8 NO 40.00 26.80
TH716DA 7/16 X .165 DUAL TAPER TO 3/8 NO 40.00 26.80
TH716SB 7/16 X .165 SINGLE TAPER TO 3/8 YES 41.50 27.81
TH716DB 7/16 X .165 DUAL TAPER TO 3/8 YES 41.50 27.81
 
TH212SA 1/2 X .120 SGL TAPER TO 7/16 OR 3/8 NO 37.82 25.34
TH212DA 1/2 X .120 DUAL TAPER TO 7/16 OR 3/8 NO 37.82 25.34
TH212SB 1/2 X .120 SGL TAPER TO 7/16 OR 3/8 YES 39.36 26.37
TH212DB 1/2 X .120 DUAL TAPER TO 7/16 OR 3/8 YES 39.36 26.37
 
TH215SA 1/2 X .156 SGL TAPER TO 7/16 OR 3/8 NO 45.00 30.15
TH215DA 1/2 X .156 DUAL TAPER TO 7/16 OR 3/8 NO 45.00 30.15
TH215SB 1/2 X .156 SGL TAPER TO 7/16 OR 3/8 YES 46.50 31.16
TH215DB 1/2 X .156 DUAL TAPER TO 7/16 OR 3/8 YES 46.50 31.16
TH218SA 1/2 X .188 SGL TAPER TO 7/16 OR 3/8 NO 50.00 33.50
TH218DA 1/2 X .188 DUAL TAPER TO 7/16 OR 3/8 NO 50.00 33.50
TH218SB 1/2 X .188 SGL TAPER TO 7/16 OR 3/8 YES 51.50 34.51
TH218DB 1/2 X .188 DUAL TAPER TO 7/16 OR 3/8 YES 51.50 34.51
ADJUSTABLE PUSHRODS  
 
REGULAR 4130 CHROMOLY  
AR54A ADJ REG. 5/16 X .049 BALL & BALL NO 11.98 9.00
AR54B ADJ REG. 5/16 X .049 BALL & BALL YES 12.46 9.35
 
AR34A ADJ REG. 3/8 X .049 BALL & BALL NO 11.14 7.46
AR34B ADJ REG. 3/8 X .049 BALL & BALL YES 11.66 7.81
HEAT TREATED 4130 CHROMOLY  
AH34A ADJ HT 3/8 X .049 BALL & BALL NO 14.12 9.46
AH34B ADJ HT 3/8 X .049 BALL & BALL YES 14.60 9.78
AH36A ADJ HT 3/8 X .065 BALL & BALL NO 22.10 14.81
AH36B ADJ HT 3/8 X .065 BALL & BALL YES 23.60 15.81
AH38A ADJ HT 3/8 X .083 BALL & BALL NO 24.44 16.37
AH38B ADJ HT 3/8 X .083 BALL & BALL YES 25.94 17.38
AH76A ADJ HT 7/16 X .065 BALL & BALL NO 24.22 16.23
AH76B ADJ HT 7/16 X .065 BALL & BALL YES 25.72 17.23
AH79A ADJ HT 7/16 X .095 4130 SCREW NO 34.02 22.79
AH79B ADJ HT 7/16 X .095 4130 SCREW YES 35.52 23.80
 
HARLEY DAVIDSON ADJUSTABLE PUSHRODS 5/16 X 32 SCREW  
AHD34B ADJ HT HARLEY EVO 3/8 X .049 YES 21.58 14.46
AHD36B ADJ HT HARLEY EVO 3/8 X .065 YES 23.96 16.05
AHD38B ADJ HT HARLEY EVO 3/8 X .083 YES 25.30 16.95
AHD79SB-EVO ADJ HT EVO 7/16 X .095 SINGLE TAPER YES 40.00 26.80
AHD79SB-TC ADJ HT TWIN CAM 7/16 X .095 SINGLE TAPER YES 40.00 26.80
AHD79SB-FI ADJ HT EVO FAST INSTALL 7/16 X .095 TAPER YES 40.00 26.80
AHD712SB-EVO ADJ HT EVO 7/16 X .120 SINGLE TAPER YES 44.00 29.48
AHD712SB-TC ADJ HT TWIN CAM 7/16 X .120 SINGLE TAPER YES 44.00 29.48
ADJUSTABLE LENGTH CHECKER PUSHRODS
ALC5B 5/16 BALL & BALL NA 17.00 11.39
ALC5C 5/16 BALL & CUP NA 17.00 11.39
ALC3B 3/8 BALL & BALL NA 17.00 11.39
ALC3C 3/8 BALL & CUP NA 17.00 11.39
ROCKER ARM ADJUSTING PARTS
BAS538SA 3/8 X 24 THD BALL ROCKER  SCREW NO 6.00 4.02
5/32 RADIUS 1.250 LONG  
BAS538LA 3/8 X 24 THD BALL ROCKER  SCREW NO 6.00 4.02
5/32 RADIUS 1.400 LONG  
BAS338A 3/8 X 24 THD BALL ROCKER  SCREW NO 6.00 4.02
3/16 RADIUS 1.400 LONG  
BAS338B 3/8 X 24 THD BALL ROCKER  SCREW YES 7.00 4.69
3/16 RADIUS 1.400 LONG  
BAS3716A 7/16 X 20 THD BALL ROCKER SCREW NO 6.50 4.36
3/16 RADIUS 1.400 LONG  
CAS538B 3/8 X 24 THD CUP ROCKER  SCREW YES 12.78 8.56
ASJN38 3/8 X 24 THD JAM NUT 12-PT 3.74 2.51
BASS-SET 16/EA BAS538SA SCREWS & ASJN38 NUTS   100.00 67.00
BALS-SET 16/EA BAS538LA SCREWS & ASJN38 NUTS 100.00 67.00
BAS3A-SET 16/EA BAS338A SCREWS & ASJN38 NUTS   100.00 67.00
BAS3B-SET 16/EA BAS338B SCREWS & ASJN38 NUTS 120.00 80.40
CAS-SET CUP ROCKER ADJ SCREW SET W/NUTS   213.00 142.71
  ONE-PIECE SWAGED END PUSHRODS 4130  
5/16 X .083 ONE PIECE (guideplate compatible)
581-(SIZE) ADD SIZE FROM 6" TO 10" EVERY .050   9.60 6.43
EXAMPLE 581-7850
   
5/16 X .083 ONE PIECE W/SHAFT ROCKER BALL 1/END
581S-(SIZE) ADD SIZE FROM 6" TO 10" EVERY .050 (guideplate compatible) 10.66 7.14
EXAMPLE 581S-7850 (WE CARRY LIMITED SIZES PRE-MADE)
5/16 X .083 ONE PIECE W/.040 OIL RESTRICTOR   
581R-(SIZE) ADD SIZE FROM 6" TO 10" EVERY .050 (guideplate compatible) 10.66 7.14
EXAMPLE 581R-7850
5/16 X .116 ONE PIECE 210 DEGREE BALL
5116-(SIZE) ADD SIZE FROM 6" TO 10" EVERY .050 (guideplate compatible) 13.72 9.19
  EXAMPLE 5116-7850    
   
  3/8 X .083 ONE PIECE (guideplate compatible)    
381-(SIZE) ADD SIZE FROM 7" TO 11" EVERY .050   11.72 7.85
  EXAMPLE 381-7850    
   
  3/8 X .083 ONE PIECE W/SHAFT ROCKER BALL 1/END    
381S-(SIZE) ADD SIZE FROM 7" TO 11" EVERY .050 (guideplate compatible) 13.32 8.92
  EXAMPLE 381S-7850 (WE CARRY LIMITED SIZES PRE-MADE)  
   
  3/8 X .083 ONE PIECE W/.040 OIL RESTRICTOR    
381R-(SIZE) ADD SIZE FROM 7" TO 11" EVERY .050 (guideplate compatible) 12.78 8.56
  EXAMPLE 381R-7850 (WE CARRY LIMITED SIZES PRE-MADE)  
   
  3/8 X .120 ONE PIECE (guideplate compatible)     
3121-(SIZE) ADD SIZE FROM 7" TO 11" EVERY .050   17.50 11.73
  EXAMPLE 3121-9500 (WE CARRY LIMITED SIZES PRE-MADE)  
   
  7/16 X .065 ONE PIECE (won't work with guideplates)    
761-(SIZE) ADD SIZE FROM 7" TO 10" EVERY .025   17.26 11.56
  EXAMPLE 761-7850    
     
  7/16 X .095 ONE PIECE (guideplate compatible)    
791GP-(SIZE) ADD SIZE TO PART NUMBER   21.68 14.53
  EXAMPLE 791-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
     
  7/16 X .095 ONE PIECE W/SHAFT ROCKER BALL 1/END    
791S-(SIZE) ADD SIZE TO PART NUMBER (won't work with guideplates)   22.38 14.99
  EXAMPLE 791-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
     
7/16 X .120 ONE PIECE (won't work with guideplates)    
7121-(SIZE) ADD SIZE TO PART NUMBER    24.50 16.42
EXAMPLE 7121-9250 (WE CARRY LIMITED SIZES PRE-MADE)
7/16 X .165 ONE PIECE (won't work with guideplates)
7161-(SIZE) ADD SIZE TO PART NUMBER    27.50 18.43
EXAMPLE 7161-9250 (WE CARRY LIMITED SIZES PRE-MADE)
   
  1/2 X .083 ONE PIECE (won't work with guideplates)    
1281-(SIZE) ADD SIZE TO PART NUMBER    31.95 21.41
  EXAMPLE 1281-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
   
  1/2 X .120 ONE PIECE (won't work with guideplates)    
12121-(SIZE) ADD SIZE TO PART NUMBER    30.00 20.10
  EXAMPLE 12121-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
   
  1/2 X .156 ONE PIECE (won't work with guideplates)    
12151-(SIZE) ADD SIZE TO PART NUMBER    36.00 24.12
  EXAMPLE 12151-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
   
  1/2 X .188 ONE PIECE (won't work with guideplates)    
12181-(SIZE) ADD SIZE TO PART NUMBER    42.00 28.14
  EXAMPLE 12181-9250 (WE CARRY LIMITED SIZES PRE-MADE)    
   
ALUMINUM 2024 T-3 oil holes   
NA56A NA ALUM 5/16 X .058 BALL/CUP & BALL  NO 15.16 10.16
NA56B NA ALUM 5/16 X .058 BALL/CUP & BALL YES 15.58 10.44
 
NA39A NA ALUM 3/8 X .083 BALL/CUP & BALL NO 17.16 11.50
NA39B NA ALUM 3/8 X .083 BALL/CUP & BALL YES 17.78 11.91
 
TITANIUM 3AL. 2.5V  
NT34A NA TI 3/8 X .042 BALL/CUP & BALL NO 65.00 43.55
NT34B NA TI 3/8 X .042 BALL/CUP & BALL YES 68.00 45.56
  MISCELLANEOUS ITEMS    
1101 CENTEK POWER VALVE SHIELD   17.42 11.67
  EASY TO INSTALL IN HOLLEY CARBURETORS  
 
 
 
 
 
  With stud mounted rocker systems, pushrod length can be adjusted to locate the rocker to valve stem contact point. You should try to get the contact point to where it stays in the center third of the valve stem through the full range of travel.