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Diamond Pistons
Take a look back at the company's humble roots, and rich, racing heritage. In the early days of hot rodding, those who sought optimum performance became innovators, pushing the envelope of speed in the quest for racing glory. Diamond Pistons, founded in 1968–the heyday of muscle cars and drag racing– was born of that innovation and continues today to be a driving force in performance and racing piston design.

Diamond Pistons Categories

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Diamond Pro Select Piston Rings
Diamond’s Pro-Select ringset’s are available for applications from naturally aspirated to high hp power adders. Bore size availability ranges from 3.346” to 4.675”, and come in a wide variety of top ring materials.
Pistons
Pit Stop USA has correct pistons for your application, whether you need need pistons for hard core racing engine or an upgrade for your street machine. We stock a great selection of brands, bore...More Details »
Wrist Pin Bushings
Wrist pin bushings from PitStopUSA.com provide wear resistance with full floating connecting rods, reduce engine friction and keep things running smoothly.
Wrist Pins
PitStopUSA.com offers a variety of Piston Wrist Pins from the biggest brands in drag racing including Mahle Wrist Pins, Manley Wrist Pins, Wiseco Wrist Pins and more at low everyday prices.
Items 1-4 of 4

Diamond Pistons Products

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Description: Wrist Pin, H-Series, 0.990 in Diameter, 2.930 in Long, 0.155 in Thick Wall, Spiral Lock, Steel, Each
Item #: DIAH9902930155
Condition: New
Limited Supply: Only 5 Left!
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Ships from Michigan.
Price: $28.99
Sale: $27.88
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Description: Wrist Pin, H-Series, 0.990 in Diameter, 2.930 in Long, 0.175 in Thick Wall, Wire Lock, Steel, Each
Item #: DIAH9902930175
Condition: New
Limited Supply: Only 8 Left!
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Price: $28.99
Sale: $27.88
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NEW!
Description: Piston, Nitrous Dome, Forged, 4.500 in Bore, 0.043 x 1/16 x 3/16 in Ring Grooves, Plus 46.0 cc, Big Block Chevy, Set of 8
Item #: DIA12710-8
Condition: New
Limited Supply: Only 1 Left!
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Price: $1,558.54
Sale: $1,443.05
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Description: Piston, Nitrous Dome, Forged, 4.600 in Bore, 0.043 x 1/16 x 3/16 in Ring Grooves, Plus 46.0 cc, Big Block Chevy, Set of 8
Item #: DIA12713-8
Condition: New
Limited Supply: Only 1 Left!
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FREE SHIPPING! Oversize Fees Waived On This Item! Ships from Michigan.
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Price: $1,558.54
Sale: $1,443.87
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NEW!
Description: Piston Rings, Pro-Select, 3.572 in Bore, File Fit, 1.5 x 1.5 x 3.0 mm Thick, Standard Tension, Steel, 8 Cylinder, Kit
Item #: DIA09053572
Condition: New
Limited Supply: Only 0 Left!
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Price: $293.39
Sale: $271.66
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Save: $21.73

NEW!
Description: Piston Rings, Pro-Select, 4.600 in Bore, File Fit, 0.43 x 0.43 x 3/16 in Thick, Standard Tension, Steel, 8 Cylinder, Kit
Item #: DIA09244600
Condition: New
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Price: $299.26
Sale: $277.09
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Description: Piston Rings, Pro-Select, 4.030 in Bore, File Fit, 1/16 x 1/16 x 3/16 in Thick, Standard Tension, Plasma Moly, 8 Cylinder, Kit
Item #: DIA09024030
Condition: New
Limited Supply: Only 2 Left!
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Price: $134.89
Sale: $125.05
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Description: Wrist Pin Bushing, 0.984 in ID, 1.040 in OD, 0.930 in Long, Bronze, Each
Item #: TDP02-5032
Condition: New
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Price: $15.99
Sale: $14.87
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Description: Piston, Street / Strip Dish, Forged, 3.572 in Bore, 1.5 x 1.5 x 3.0 mm Ring Grooves, Minus 19.0 cc, Ford Modular, Set of 8
Item #: DIA30006-8
Condition: New
Limited Supply: Only 1 Left!
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Price: $994.09
Sale: $920.51
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Save: $73.58

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Description: Piston, Street / Strip Dish, Forged, 4.350 in Bore, 1/16 x 1/16 x 3/16 in Ring Grooves, Minus 13.0 cc, Mopar RB-Series, Set of 8
Item #: DIA52415-8
Condition: New
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Price: $1,167.74
Sale: $1,081.87
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Save: $85.87

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Description: Piston, Street / Strip Flat Top, Forged, 4.100 in Bore, 1/16 x 1/16 x 3/16 in Ring Grooves, Minus 6.8 cc, Small Block Mopar, Set of 8
Item #: DIA51013-8
Condition: New
Limited Supply: Only 1 Left!
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Price: $1,083.57
Sale: $1,003.87
Save: 7%
Save: $79.70

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Description: Wrist Pin, G-Series, 0.927 in Diameter, 2.750 in Long, 0.155 in Thick Wall, Spiral Lock, Chromoly, Each
Item #: DIAG9272750155
Condition: New
Limited Supply: Only 4 Left!
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Price: $14.99
Sale: $13.88
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Description: Wrist Pin, G-Series, 0.927 in Diameter, 2.500 in Long, 0.155 in Thick Wall, Spiral Lock, Chromoly, Each
Item #: DIAG9272500155
Condition: New
Same Day Shipping!
Ships from Michigan.
Price: $14.99
Sale: $13.88
Save: 7%
Save: $1.11
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Description: Wrist Pin, G-Series, 0.927 in Diameter, 2.950 in Long, 0.155 in Thick Wall, Spiral Lock, Chromoly, Each
Item #: DIAG9272950155
Condition: New
Same Day Shipping!
Ships from Michigan.
Price: $14.99
Sale: $13.88
Save: 7%
Save: $1.11
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Items 1-14 of 14

More About Diamond Pistons

Take a look back at the company's humble roots, and rich, racing heritage. In the early days of hot rodding, those who sought optimum performance became innovators, pushing the envelope of speed in the quest for racing glory. Diamond Pistons, founded in 1968–the heyday of muscle cars and drag racing– was born of that innovation and continues today to be a driving force in performance and racing piston design. Its original founders, “Diamond” Jim Cavallaro, Nick Plantas and Butch Eldkins, were a group of racers and entrepreneurs who combined resources to form the company’s first iteration. It didn’t take long for them to carve a niche in the high-performance game, with Diamond quickly becoming involved with Super Stock and Pro Stock in the early ‘70s. Like many companies of that ilk and era, Diamond wasn’t focused on doing just one thing. Instead, they did it all. Cylinder head porting, engine building, and all other manner of performance took place under Diamond’s roof. “It was a vast line of stuff they did,” said Mike Panetta, who is currently Sales and Product Manager for Diamond. “They built Pro Stock engines, did head work, and even had the NASCAR contract to build all the engines for the IROC cars. It was a fully operational machine shop, which built a lot of parts; from rocker arms, to fittings, and pretty much anything else they needed.” As demand for performance peaked, Diamond started to machine their own pistons using forging blanks finished in-house to their rigid specs and quality. That business plan continued into the early ‘90s when a new owner, Bob Fox, decided to shift the company’s considerable engineering resources solely to piston development. Fox, who previously worked for the trio of founders as a salesman, purchased the company from Jim, Butch, and Nick in 1999. With new leadership and product direction, Diamond’s resources became hyper-focused on performance and racing piston technology and innovation. “Throughout the years we’ve kept up with that technology and have upgraded our equipment and machinery along with new software to stay competitive in the business. Since our focus became refined, we’ve done a great job of staying ahead of the crowd,” Panetta said. “We’ve come full circle. Once Bob took over the business, he had a great relationship with a lot of larger teams in and out of NASCAR and NHRA,” said Panetta. That relationship manifested itself in 2001 when Diamond began working with Greg Anderson and Jason Line on their NHRA Pro Stock engine programs– a move that completed the circle for Diamond as more and more teams sought R&D as well as manufacturing of custom pistons for their engine programs. History of Diamond Pistons Here are some of Diamond's early examples of forged pistons, which found their way into muscle cars and race cars across the country. Now just a few years later, Diamond supplies pistons almost exclusively to all NHRA Pro Stock teams. That technology then trickles down to designs available to others in the racing sphere. “Our top segment is drag racing, with a strong presence in the circle track and diesel markets too. “We’re always looking forward, wanting to develop the next big thing in piston technology – from materials and machining, to tooling techniques and new software – we are always looking for innovative ways to stay ahead of the curve. While some may think that piston technology has reached its zenith, that’s hardly the case, and Diamond is hot on the heels of cutting edge machining techniques, engineering advances, and revolutionary new materials. “It never stops. There is always something new,” said Panetta. Panetta sums up the new philosophy of Diamond Pistons succinctly: “If you sit still, you’ll be passed. We don’t plan on being passed.