Click to enlargeSRP Forged Pistons

Ford 347 stroker pistons.

SRP 140689 forged pistons.

This piston set is based on a Ford 302 with a .030 overbore.

Makes a 347 cubic inch stroker with a 3.4 stroke crankshaft and a 5.4" connecting rod.

Sold as a set of 8 forged pistons.

Includes wrist pins.

Bore size is 4.030".

CNC machined ring grooves accept 1/16" and 1/16" and 3/16" rings.

Dome volume is a -5CC.

Each piston weighs in at 423 grams.

.000 deck height.

Wrist pins are .927 X 2.750 X .150 wall.

Designed for a rod length of 5.400" and a stroke of 3.000".

Compression height is 1.100".

Provides a 11.5 compression ratio with 58cc heads.

Provides a 10.9 compression ratio with 64cc heads.

Provides a 10.4 compression ratio with 72cc heads.

Fits Ford TFS, GT40, Canfield, Brodix Track 1, OEM heads and Dart windsor heads.

TECH NOTE: Will not fit Twisted Wedge or Edelbrock 7721 heads or N361 heads.

Made of 4032 wrought aluminum alloy, designed for street and strip applications utilizing compression ratios that are compatible with pump gas.

These pistons also provide a quieter engine on cold start-up.

Features symetrical valve pockets fully radiused.

Honed pin bore, forged side relief.

Full floating wrist pin.

Double spiro locks.

Machined oil drain back holes (not slotted).

Pressure fed pin oilers.

SRP pistons are forged from wrought alluminum alloys. Wrought aluminum is 20% stronger than aluminum bar stock and 50% stronger than cast aluminum pistons.

SRP uses only the highest grade wrought aluminum alloys to make a stronger, lighter piston.

These aerospace quality alloys have been rigourously tested and found to be the most durable material for this application.

To optimize the weight of the piston, application specific forgings are designed in 3D computer modeling programs. This makes it possible to have consistent dome thickness which will not compromise the durability of the piston.

All SRP pistons feature fully CNC machined domes, dishes and valve reliefs to give you precise compression ratios and consistent weights.

All SRP pistons incorporate CNC diamond turned skirts to provide you with a better, more consistent finish, and have CNC honed pin bores and are thoroughly deburred prior to cleaning and packaging so no prep work is required.

SRP pistons are ready to run right out of the box.

ORDERING NOTE: Pistons are not returnable. Please be sure to check your engines oversize requirements, cam requirements and head and piston to valve clearance requirements before ordering. We recommend that this be done by an experienced and competant engine builder.


Ford 347 stroker pistons SRP 140689 forged pistons SRP-140689$561.97
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