Main >> Pistons >> Ross >> Auto. Stocking >> Ford Flathead/Mercury

Comp Ratio base on: Dome height 0.187 Block Height: 10.438 Forced Induction: Yes - up to 5psi Nitrous: Yes - up to 250HP Pins: 120 grams Ring Grooves: see notes Tech Tip: top ring land is .280 wide to accommodate relieved blocks Ford Flathead/Mercury Dome Top Pistons Complete Piston Kit: Pistons, Pins, Spiro Lox (rings NOT included) Features/Description These pistons are a faithful reproduction of Art Sparks' original forged flathead design. Machined on special ROSS flathead forgings for maximum strength and minimum weight. All pistons in this section include aircraft quality pins weighing 120 grams which are retained by spiro lox. Rings included are 3/32, 3/32, 5/32, except for part numbers 80577, 99818 & 99819 which include 1.5, 1.5, 3MM Rings. Top ring land is .280 wide to accommodate relieved blocks. Dome height is 0.187.

Make Bore Stroke Rod Length C.H.  Weight Notes Part # Price/Set Ford  3.312  3.750  7.000 1.561  315  1 80563 $385 Mercury  3.312  4.000  7.000 1.436  314  1 80564 $385 Mercury  3.312  4.000  7.000 1.436  323  2 80577 $439 Mercury  3.312  4.125  7.000 1.374  312  1 80572 $385 Mercury  3.312  4.125  7.000 1.374  313  2 99818 $439 Ford  3.342  3.750  7.000 1.561  328  1 80573 $385 Mercury  3.342  4.000  7.000 1.436  327  1 80567 $385 Mercury  3.342  4.125  7.000 1.374  329  1 80568 $385 Ford  3.375  3.750  7.000 1.561  345  1 80569 $385 Mercury  3.375  4.000  7.000 1.436  345  1 80570 $385 Mercury  3.375  4.000  7.000 1.436  359  2 99819 $439 Mercury  3.375  4.125  7.000 1.374  347  1 80571 $385

Notes: 1: Price includes 3/32, 3/32, 5/32 stock size cast ring set 2: Price includes "millimeter" ring set

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