Set of8 Speed Pro DDP Hypereutectic COATED Pistons+Cast Rings for Chevrolet 350
For press of full float rods (LR63 clips sold separately)
About Speed Pro Digital Diamond Profile Hypereutectic Pistons:
Dominating the horsepower-per-dollar race.
These Speed-Pro Digital Diamond Profile (DDP) hypereutectic pistons feature a new digital actuated diamond turning process that produces precision skirt profiles. This new Digital Diamond Profile (DDP) technology creates a unique barrel profile of the pistons, promoting an oil wedge between the piston skirt and the cylinder wall. They feature a newly designed ring groove geometry using Thermal Arching Compensation (TAC) that machines the piston ring grooves with an uptilt to offset thermal arching distortion. This squares the ring face up to the cylinder wall for increased power and decreased oil consumption. The Speed-Pro Digital Diamond Profile hypereutectic pistons feature the next generation of Duroshield skirt coating, reducing friction across the entire rpm range and increasing wear resistance for longer life and superior noise and vibration reduction. They also use precision-machined piston pin bores that allow for either fixed or floating wrist pins; pin locks available separately. The pistons come weight-matched to a 4 gram (+/-2 grams) maximum variation within every engine set.
Federal Mogul/Speed Pro Piston Part
Ring groove size
H345DCP+30 (H345DCP) plus cast piston ring set 50564CP (Hastings/Perfect Circle/MAHLE)
We also have other sizes available.
Chevrolet 350ci V-8 - 4.030" bore (at +.030")
1982-90 Car (USA)
Can be used with other Chevrolet 350ci engines as a performance upgrade.
Flat head w/4-valve reliefs. Perf. or reg. duty operation. Not OE duplicate Wt.; Use as sets only.
idle to 6000+rpm
Good for street/strip or light race
1.548 compression distance
-5cc head volume
Compression ratio (+.030" bore):
w/58cc heads 9.97:1
w/64cc heads 9.35:1
w/72cc heads 8.65:1
w/76cc heads 8.34:1
5/64" 5/64" 3/16" ring grooves
.928" pin diam.
Press-fit or full float (clips sold separately)
These pistons can be free floated but LR63 locks must be purchased separately.
Stock 5.700" length rodsStock 3.480" stroke
.025" deck clr
.0010" skirt clr
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We also have engine rebuild kits and valve train parts listed on . Feel free to contact our professional sales team toll-free (within USA & Canada) at 800.756.1114 or (outside USA & Canada) at 601.693.8282, EXT. 166 Monday-Friday 8am-6pm Eastern.
Thank you for looking at our listing and look forward to doing business!
All pistons include piston pinsAll pistons include piston pinsNOTE: ALL SPEED PRO AND SILVOLITE CAST AND HYPEREUTECTIC, AND FORGED PISTONS ARE NOW MADE OFFSHORE. NOT IN THE UNITED STATES. WE ARE NOT HAPPY WITH THIS EITHER, BUT THEY ARE JUST ABOUT THE ONLY SHOW IN TOWN. THANK YOU, FALCON SALES