Ford Big Block "Boss 429"
Race - Flat or DomeTop

• Designed to fit OEM and Motorsport “Boss” heads: C9AE,DOAE,E2ZM & E3ZM AR Hemi.
• Designed with pump gas friendly compression ratios as resto/replacement pistons.
• Will work with small nitrous kits. 2618 alloy.
• Ratios figured for .030” deck @ 10.295”.
• Standard 1/16” x 1/16” x 3/16” ring package.
• Premium 8620 pins included.
• “O” ring volume = 2.75cc’s.
• Top ring down = .375”.
• Valve relief depth = .275” intake & .269” exhaust.
• Designed for 2.400” diameter intake valves and 1.900” exhaust valves.
• Items are non-stock parts, made to order as necessary.

Flat Top C9AE-E 429 Block: 10.295” Deck Height (replacement stroker pistons)
Part #	Bore	Stroke	Rod	C. D.	Wt	Pin	CC's	Comp Ratio		Purchase Online
								Semi 84cc	Full 100cc
								10.3 10.3 10.4 10.5	9.0 9.1 9.1 9.2
40805 $799	4.390 4.400 4.420 4.440	3.850	6.605	1.765	-	1.040	-7.0			Discounted Prices
40809 $799	4.390 4.400 4.420 4.440	4.150	6.800	1.390	-	.990	-7.0	11.0 11.0 11.1 11.2	9.7 9.7 9.8 9.9	Discounted Prices
40813 $811	4.390 4.400 4.420 4.440	4.300	6.800	1.315	593 603 614 625	.990	-7.0	11.4 11.4 11.5 11.6	10.0 10.0 10.1 10.2	Discounted Prices