Part Number Available Sizes Ring Pack Description Compression Ratio
AMC 401   50.6cc 56.5cc 58.0cc 58.6cc
L2380NF 30, 40 5/64-5/64-3/16 .170" Dish   10.56 9.95 9.81 9.76
Buick 3.8L V6     48.0cc    
L2481F Std, 30, 40 5/64-5/64-3/16 .245" Dish     7.96    
Buick 455 66.0cc 68.0cc 69.0cc 71.0cc 77.5cc
L2353F 30, 40 5/64-5/64-3/16 .156" Dish 9.15 9.01 8.94 8.81 8.41
Chevy 383 58.0cc 64.0cc 68.0cc 72.0cc 76.0cc
L2491NF Std, 30, 40, 60 1/16-1/16-3/16 5.7" Rods, FT, 2  reliefs 11.55 10.76 10.3 9.88 9.49
Chevy 509 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
L2513F Std, 30, 60 1/16-1/16-3/16 4.500" Bore, FT   9.35 9.18 8.73 8.61
Chevy 540 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
LW2634F Std, 30 .043-.043-3.0mm 4.50" Bore x 4.25" Stroke, Lt Wt, .450" Dome   14.41 14.01 12.96 12.69
LW2633F Std, 30, 60 .043-.043-3.0mm 4.50" Bore x 4.25" Stroke, Lt Wt, FT, 2  reliefs   9.86 9.69 9.2 9.08
Chevy 302 58.0cc 64.0cc 68.0cc 72.0cc 76.0cc
L2210AF 60 1/16-1/16-1/8 .410" Dome 13.41 12.2 11.52 10.91 10.38
L2210AF 30 1/16-1/16-1/8 .430" Dome 13.24 12.05 11.37 10.78 10.25
Chevy 327 58.0cc 64.0cc 68.0cc 72.0cc 76.0cc
L2166NF Std, 20, 30, 40, 60 5/64-5/64-3/16 .125" Dome 11.2 10.35 9.87 9.43 9.03
L2165F Std, 20, 30, 40, 60 5/64-5/64-3/16 FT, 4 reliefs 9.69 9.07 8.71 8.37 8.06
Chevy 350 58.0cc 64.0cc 68.0cc 72.0cc 76.0cc
L2403NF Std, 20, 30, 40, 60 5/64-5/64-3/16 .068 Dish 9.73 9.14 8.79 8.47 8.18
L2304F Std, 30, 60 5/64-5/64-3/16 .100 Dome 11.4 10.63 10.15 9.71 9.31
LW2304F 40 1/16-1/16-3/16 Lt Wt, .100 Dome 11.4 10.63 10.15 9.71 9.31
LW2626F 30, 40, 60 1.5-1.5-3.0mm 6.0" Rod, Lt Wt, .100 Dome 11.46 10.63 10.15 9.71 9.31
L2252YF 30, 40, 60 1/16-1/16-1/8 .200 Dome 12.94 11.87 11.26 10.71 10.22
8LW2503F 30, 40, 60 1/16-1/16-3/16 Lt Wt, 350 Dome   12.07 11.43 10.87 10.36
8LW2509F 30, 60 1/16-1/16-3/16 6.0" rod, Lt Wt, .350 Dome   12.07 11.43 10.87 10.36
LW2603F 30, 60 1/16-1/16-3/16 Lt Wt, 10.9cc Reverse Dome 9.53 8.97 8.63 8.32 8.04
L2441F Std, 30 5/64-5/64-3/16 Supercharged or Turbo, 21.1cc D Cup 8.82 8.35 8.06 7.8 7.55
L2490NF Std, 30, 60 1/16-1/16-3/16 2  reliefs 10.79 10.06 9.63 9.24 8.88
8LW2505F 30, 60 1/16-1/16-3/16 Lt Wt, FT, 2  reliefs 10.3 9.47 9.09 8.75 8.43
8LW2511F 60 1/16-1/16-3/16 6.0" rod, Lt Wt, FT, 2  reliefs 10.1 9.47 9.09 8.75 8.43
L2256F Std, 20, 30, 40, 60 5/64-5/64-3/16 FT, 4  reliefs 10.4 9.72 9.32 8.96 8.62
LW2256F 30, 40, 60 1/16-1/16-3/16 Lt Wt, FT, 4  reliefs 10.4 9.72 9.32 8.96 8.62
Chevy 396 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
L2240NF Std, 30, 40,60 5/64-5/64-3/16 65-69, 325/350HP, .182 Dome   9.09 8.89 8.36 5.23
L2242NF 30, 40, 60 5/64-5/64-3/16 65-69, 375HP, .319 Dome     1.58 9.9 9.7
Chevy 400 58.0cc 64.0cc 68.0cc 72.0cc 76.0cc
L2352F 30, 40, 60 5/64-5/64-3/16 .038 Dish 10.53 9.91 9.55 9.21 8.9
LW2606F 60 1/16-1/16-3/16 Lt Wt, 16.2cc Reverse Dome 10.38 9.78 9.43 9.1 8.8
LW2629F 40, 60 1.5-1.5-3.0mm 6.0" Rod, Lt Wt, 16.2cc Reverse Dome 10.39 9.79 9.44 9.11 8.81
LW2632F 30, 40, 60 1.5-1.5-3.0mm 5.7" Rod, Lt Wt, 25cc Reverse Dome 9.54 9.05 8.75 8.47 8.21
L2489F 40 5/64-5/64-3/16 5.7" Rods, FT, 2  reliefs 11.81 11.03 10.57 10.15 9.76
8LW2517F 30 1/16-1/16-3/16 5.7" rod, Lt Wt, FT, 2  reliefs 11.8 11.02 10.56 10.14 9.76
8LW2515F 30 1/16-1/16-3/16 5.7" rod, Lt Wt, .150 Dome 13.6 12.55 11.94 11.4 10.9
Chevy 402 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
L2383F 30, 40, 60 5/64-5/64-3/16 70-72, 350HP, .110 Dome 9.29 8.83 8.65 8.16 8.03
L2328NF 30, 60 5/64-5/64-3/16 .319 Dome   10.81 10.53    
Chevy 427 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
L2300NF Std, 30, 40, 60 5/64-5/64-3/16 66-69, 335/390HP, .140 Dome 9.98 9.46 9.27 8.73 8.59
L2268NF 30, 60 5/64-5/64-3/16 66-69, 425/435HP, .255 Dome   11.25   10.18 9.99
L2308AF 30, 60 1/16-1/16-3/16 .585 Dome       11.66 11.39
Chevy 454 100.9cc 106.9ccc 109.4cc 116.9cc 119.0cc
L2399NF Std, 30, 40, 60 5/64-5/64-3/16 1971, LS-6, .095 Dome 10.23 9.71 9.52 8.98 8.84
L2349F 60 5/64-5/64-3/16 .210 Dome 11.84 11.15 10.89 10.18 10
L2349F 30 5/64-5/64-3/16 .221 Dome 11.89 11.18 10.91 10.19 10.01
L2349F Std 5/64-5/64-3/16 .265 Dome 11.9 11.18 10.91 10.18 9.99
L2465F 60 1/16-1/16-3/16 .215 Dome 11.29 10.67 10.43 9.78 9.61
L2465F 30 1/16-1/16-3/16 .226 Dome 11.31 10.68 10.44 9.78 9.61
L2465F Std 1/16-1/16-3/16 .270 Dome 11.34 10.69 10.44 9.78 9.6
L2307AF Std, 30, 60 1/16-1/16-3/16 .580 Dome       12.5 12.21
L2453F Std, 30, 60 5/64-5/64-3/16 Supercharged or Turbo, 7.96cc D Cup 8.54 8.19 8.06 7.68 7.58
L2377F Std, 20, 30, 40, 60 5/64-5/64-3/16 FT, 2  reliefs 8.72 8.36 8.22 7.83 7.73
Chevy 8.1L (496)          
L2641F 30, 40, 60 2.0-2.0-4.0mm FT, 2  reliefs          
Chevy Corvair 164          
L2206F Std, 20, 30, 40, 60 1/16-1/16-1/8 FT          
Chevy LS-1, 382 Stroker     66.0cc    
LW2624F Std, 25MM 1.5-1.5-3.0mm 4.00" Stroker, 6.125" Rod, .927" pin, FT, 2  reliefs     10.84    
Chevy LS-1, 402 Stroker     66.0cc    
LW2625F Std, 30, 60 1.5-1.5-3.0mm 4.00" Bore x 4.00" Stroke, 6.125" Rod, .927" pin, FT, 2  reliefs     11.38    
Chevy LS-1     66.0cc    
L2640F 30, 40, 60 1.5-1.5-3.0mm 4.00" Bore x 3.62" Stroke, .944" pin, FT, 2  reliefs     10.04    
Chrysler 340   63.0cc 65.0cc 68.4cc 71.0cc
L2316F 20, 30, 40, 60 5/64-5/64-3/16 FT, 2  reliefs   10.35 10.11 9.73 9.46
Chrysler 383     78.5cc 88.0cc  
L2315NF 30, 40, 60 5/64-5/64-3/16 FT     9.77 8.94  
Chrysler 440     78.5cc 88.0cc  
L2295F 60 1/16-1/16-3/16 .125 Dome     11.34 10.34  
L2295F 30 1/16-1/16-3/16 .140 Dome     11.34 10.34  
L2266F Std, 30, 40, 60 5/64-5/64-3/16 FT     9.33 8.66  
L2355F Std, 30, 40, 60 5/64-5/64-3/16 70-72, Six Pack, , 4  reliefs     10.17 9.37  
Ford 289/302 54.5cc 58.2cc 60.4cc 63.0cc 69.0cc
L2482F Std, 20, 30, 40, 60 5/64-5/64-3/16 FT, 4  reliefs 10.14 9.67 9.42 9.13 8.55
L2488F Std, 20, 30, 40, 60 1.5-1.5-4.0mm FT, 4  reliefs 10.65 10.13 9.85 9.53 8.89
LW2488F 40 1/16-1/16-3/16 Lt Wt, FT, 4  reliefs 10.65 10.13 9.85 9.53 8.89
Ford 351 Cleveland   58.6cc 63.0cc 67.0cc 76.2cc
L2379F Std, 30, 40 5/64-5/64-3/16 FT, 2  reliefs   10.76 10.22 9.78 8.9
Ford 351W     60.4cc 63.0cc 69.0cc
L2446F Std, 30, 40 5/64-5/64-3/16 .110 Dish     9.3 9.06 8.56
Ford 390   67.1cc 68.0cc 71.0cc 74.0cc
L2291F Std, 20, 30, 40, 60 5/64-3/32-3/16 FT, 4  relief   10 9.91 9.62 9.36
Ford 4.6L   44.0cc 51.8cc 54.0cc  
L2609F 50MM 1.5-1.5-3.0mm 4  engines, .060 Dish   11.88 10.5    
L2608F Std, 50MM, 75MM 1.5-1.5-3.0mm 2  engines, .150 Dish   10.51 9.44    
L2623F Std, 50MM, 75MM 1.5-1.5-3.0mm Cobra, 4 , Supercharged, 13.5cc Dish   9.87 8.93 8.7  
Ford 428   67.1cc 68.0cc 71.0cc 74.0cc
L2303NF Std, 30, 40, 60 5/64-5/64-3/16 Cobra Jet, .085 Dish     10.66 10.35 10.07
Ford 429 72.0cc 73.5cc 77.0cc 92.0cc 97.0cc
L2366F Std, 30, 40 5/64-5/64-3/16 FT 11.1 10.93 10.56 9.23 8.87
Ford 460          
L2404F Std, 30, 40, 60 5/64-5/64-3/16 .180 Dish 9.37 9.26 9.02 8.12 7.86
L2443NF 30, 60 5/64-5/64-3/16 .332 Dome     12.49 10.73 10.26
LW2602NF 30, 60 5/64-5/64-3/16 Lt Wt, FT, 1  relief 11.49 11.34 10.98 9.7 9.34
Ford 5.4L   44.0cc 51.8cc    
L2622F Std, 50MM, 75MM 1.5-1.5-3.0mm Lightning, 2 , Supercharged, 20.5cc Dish   8.6 7.99    
Olds 350 64.0cc 70.0cc 72.0cc 75.0cc 80.0cc
L2321F 30 5/64-5/64-3/16 .076 Dish 9.67 9.09 8.91 8.66 8.28
L2320F Std, 30 5/64-5/64-3/16 68-70, w/Outside Air, W-31, FT 10.31 9.64 9.44 9.16 8.73
Olds 455 64.0cc 70.0cc 72.0cc 75.0cc 80.0cc
L2323F Std, 30, 40, 60 5/64-5/64-3/16 .142 Dish 10.68 10.12 9.95 9.7 9.32
Pontiac 400 72.0cc 87.0cc 96.0cc 111.0cc 114.0cc
L2279NF 60 1/16-1/16-1/8 .190 Dome 11.93 10.15 9.34 8.26 8.08
L2279NF 30 1/16-1/16-1/8 .225 Dome 11.94 10.14 9.31 8.23 8.05
L2262F Std, 20, 30, 40, 60 5/64-5/64-3/16 FT, 4  reliefs 9.94 8.7 8.11 7.3 7.16
Pontiac 455 72.0cc 87.0cc 96.0cc 111.0cc 114.0cc
L2359NF Std, 30, 40, 60 5/64-5/64-3/16 FT,4  reliefs 11.51 10.01 9.3 8.34 8.17

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