Chevy Big Block
Street Series - Dome Top

• Works with most OEM and aftermarket open and closed chamber cylinder heads.
• Will work with small nitrous applications. 2618 alloy.
• Increased underhead thickness for durability.
• Ratios figured for .010” to .012” deck@9.800”.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium 8620 pins included.
• Gasket volume = 9.6cc to 10.7cc.
• Top ring down = .280”.
• 12201-12234 Designed for 2.190” diameter intake valve and 1.880” exhaust.
• 12235-12244 Designed for 2.300” diameter intake valve and 1.880” exhaust.
• Valve relief depth = .310” intake.
• Items are non-stock parts, made to order as necessary.

Big Block Chevy : 9.800" Deck Height Ratios figured from 0.10" to 0.12" deck @ 9.800
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								98cc	102cc	110cc
								11.4 11.5 11.6 11.7 11.8	10.9 11.0 11.1 11.3 11.3	10.1 10.2 10.3 10.4 10.5
12201 $742	4.280 4.310 4.320 4.350 4.360	3.766	6.135	1.765	689 698 705 717 721	.990	27.5				Discounted Prices
12211 $742	4.280 4.310 4.320 4.350 4.360	4.000	6.135	1.655	644 660 665 670 675	.990	21.25	11.5 11.6 11.6 11.8 11.8	11.0 11.2 11.2 11.3 11.4	10.2 10.3 10.3 10.5 10.6	Discounted Prices
12221 $742	4.155 4.165 4.175 4.185	3.766	6.135	1.765	628 630 632 635	.990	23.5	10.4 10.4 10.4 10.5	10.0 10.0 10.0 10.1	9.3 9.3 9.3 9.4	Discounted Prices
12231 $742	4.155 4.165 4.175 4.185	4.000	6.135	1.655	-	.990	18.0	10.5 10.6 10.6 10.7	10.1 10.2 10.2 10.3	9.4 9.5 9.5 9.6	Discounted Prices

Big Block Chevy : 9.800" Deck Height Designed for open style chamber heads.
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio			Purchase Online
								112cc	118cc	124cc
								10.6 10.8 10.9 11.0 11.2	10.1 10.2 10.4 10.5 10.6	9.7 9.8 9.9 10.0 10.1
12235 $742	4.470 4.500 4.530 4.560 4.600	4.000	6.135	1.655	-	.990	20.0				Discounted Prices
12240* $771	4.470 4.500 4.530 4.560 4.600	4.250	6.385	1.280	642 649 652 661 669	.990	12.0	10.5 10.6 10.8 10.9 11.0	10.1 10.1 10.3 10.4 10.6	9.6 9.6 9.9 10.0 10.1	Discounted Prices

* Includes Oil ring support rails.