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Fred Dufrene's Plug Comparison Chart
 
short      reach
            
AC
BOSCH
CHAMPION
LODGE
MARELLI
MARCHAL
 NGK
 
W45T1
L 90
CN
CW 3N
37S
  
 
W145T1
L 88A
HBN
  
36
B 4H
45 F
W175T1
L 86
HN
CW 5N
35/36
B7 HS
 
W225T1
L 85
  
CW 6N
35
  
42FF
W240T1
L 81
2HN
CW 7N
34S
  
41F
W260T1
L 78
3HN
CW8N
  
B8HS
 
W145T35
L 95Y
CNY
CW5NP
  
BP 4H
 
W175T35
L 92Y
    
GT 35
BP 6HS
43 FS
W200T35
L 87Y
HNY
CW6NP
35/1
  
42 FS
  
L 82Y
2 HNY
  
GT 34
BP 7 HS
   
L 81Y
  
CW8NP
    
long reach
            
AC
BOSCH
CHAMPION
LODGE
MARELLI
MARCHAL
 NGK
 
W125T2
N 8
CLNH
CW 4L
36 HS
B5 ES
45 XL
W160T2
N 6
HBLN
CW5L
  
B 6ES
 Indian
44 XL
W175T2
N 5
  
CW7L
35 HS
   Indian
42 XL
W225T2
N 4
  
CW7L
  
B 7ES
 Indian
41 8XL
W260T2
N 3
2 HLN
CW9L
34HS
B8ES
 
W160T30
N 16Y
  
CW4LP
  
BP 4E
 
W145T30
N 14Y
BLNY
  
GT 35 H
BP 5ES
 
W175T30
N 12Y
CLNY
CW5LP
     Indian
 
W160T30
N 11Y
  
CW6LP
  
BP 6ES
 Indian
 
W175T30
N 10Y
  
CW67LP
GT34H
   Indian
 
W200T30
N 9Y
HLNY
CW7LP
    
   
N 8Y
      
BP7ES
 Indian
Hot plugs = Red. Cold plugs = Blue