Butler Performance Inc. » Ross Racing Pistons

Ross Racing Pistons

Drawing on over 30 years of piston design and manufacturing for all forms of motor sports, ROSS Racing Pistons has met the continual need for the most advanced forged pistons in the racing industry. Utilizing some of the most sophisticated design and analysis software, along with ultra modern CNC machining centers, ROSS has developed a dedicated line of forgings. Get your Ross Racing Pistons at Butler LS.

Ross Racing Pistons From Butler Performance

Mechanic installing Ross Racing pistons for a satisfied customer.

Why These Pistons Deliver

Butler Performance sources Ross Racing pistons for builders who demand repeatable power and predictable ring seal under high cylinder pressures.

These forged crowns resist thermal distortion and control expansion, improving piston-to-wall stability at high rpm. Matched to properly ported Pontiac cylinder heads, the result is stronger midrange torque and more consistent combustion. This is performance you can feel on the street and trust on the dyno.

Buy With Confidence

You can start by confirming your bore and rod details. After that, you can choose the crown style and target dish for your compression goal, then pick quick-ship or custom CNC milling at checkout. Then, add wrist pin and ring-pack preferences in the order notes.

After you place the order, a Butler tech reviews fitment and confirms final details so your pistons arrive ready for installation. That human check reduces surprises and saves shop time.

Praised By Pontiac Enthusiasts

Forum threads and shop conversations consistently point builders to Butler Performance for real Pontiac expertise. Choosing Ross Racing pistons gives you parts and access to a team that understands how pistons interact with rods and cams, and with properly ported Pontiac cylinder heads, shortening the learning curve.

Solve Your Build Headaches

These pistons remove common fitment and performance problems that slow projects down.

They stabilize ring gaps after heat cycles and eliminate guesswork when head milling or changing cam profiles. For restorations and high-performance swaps, Ross Racing pistons simplify the path to reliable compression and consistent power delivery.

Pontiac Ross Racing Pistons for Outstanding Engine Build

Find the right Ross Racing Pistons for your Pontiac engine build with Butler Performance’s selection of high-quality piston options. Designed for enthusiasts, racers, builders, and Pontiac owners, these pistons provide the strength and reliability needed for demanding street and competition applications. Explore available options and pair them with compatible rotating assembly components and matching piston pins for a complete performance setup.

Features That Make Ross Racing Pistons Stand Out More

Precision-Engineered for Pontiac Performance

Pontiac Ross Racing Pistons are manufactured to exact specifications, providing the precise fit and consistent performance needed for Pontiac engine builds.

Ideal for Custom Engine Builds

Designed to complement custom builds ranging from classic restorations to high-performance projects.

Lightweight Performance Design

It features a lightweight design that reduces reciprocating mass while maintaining the strength needed for demanding applications.

Built to deliver dependable durability and performance, these pistons are ready for your next project. Get yours now and complete your Pontiac engine build with confidence.


Ross Racing Pistons Categories

View  
Items 1-11 of 11
No Image Available
Pontiac V8 389 Pistons Early or Late — 389 Pistons for Pontiac V8s The 389 is the engine that built Pontiac's reputation, and it is the one displacement where the piston question...More Details »
No Image Available
Pontiac V8 400 Pistons Bore, Stroke and Compression — 400 Pistons for Pontiac V8s 400 Pistons decide the two numbers that matter most on a Pontiac 400 build: your finished bore and...More Details »
No Image Available
Pontiac V8 421 Pistons Big Journal, Small Bore — 421 Pistons for Pontiac V8s 421 Pistons are their own problem. The 421 uses the big 3.25" main journal block but a smaller standard...More Details »
No Image Available
Pontiac V8 428 Pistons Stock Stroke and Stroker — 428 Pistons for Pontiac V8s 428 Pistons share a bore family with the 400 but not a stroke. The 428 came with a 4.000" stroke crank,...More Details »
No Image Available
Pontiac V8 455 Pistons Where the Cubic Inches Get Paid For — 455 Pistons for Pontiac V8s The 455 is the biggest factory Pontiac V8, and the piston is what decides whether it comes...More Details »
500hp+ Pontiac Carbureted Muscle Car Engine on Pump Gas
Pontiac V8 500hp+ Pontiac Carbureted Muscle Car Engine on Pump Gas The Classic Combination — 500hp+ Pontiac Carbureted Muscle Car Engine on Pump Gas for Pontiac V8s This is the parts...More Details »
500hp+ Pontiac EFI Muscle Car Engine on Pump Gas
Pontiac V8 500hp+ Pontiac EFI Muscle Car Engine on Pump Gas Fuel Injection Without the Fight — 500hp+ Pontiac EFI Muscle Car Engine on Pump Gas for Pontiac V8s This is the same 500hp+...More Details »
600hp+ Torqstorm Supercharged Engine
Pontiac V8 600hp+ Torqstorm Supercharged Engine Boost on Top of Cubic Inches — 600hp+ Torqstorm Supercharged Engine for Pontiac V8s Boost on a Pontiac does not have to mean a race...More Details »
700hp+ 535ci Pump Gas Engine w/ IAII Aluminum Block
Pontiac V8 700hp+ 535ci Pump Gas Engine w/ IAII Aluminum Block New Block, Big Inches — 700hp+ 535ci Pump Gas Engine w/ IAII Aluminum Block for Pontiac V8s This is Butler's 700hp+ 535...More Details »
700hp+ 535ci Pump Gas Engine w/ IAII Cast Block
Pontiac V8 700hp+ 535ci Pump Gas Engine w/ IAII Cast Block Iron and Attitude — 700hp+ 535ci Pump Gas Engine w/ IAII Cast Block for Pontiac V8s The IA II cast block is the iron...More Details »
Pins
Pontiac V8 Pins Small Part, Big Load — Pins for Pontiac V8s Wrist pins are the smallest part in the rotating assembly and one of the first to complain when cylinder pressure climbs....More Details »
Items 1-11 of 11

Ross Racing Pistons Products

Sort
View
 
Items 1-30 of 34
Description: Quick Ship from Butler Ross Racing Pistons 3.75 Stroke 1.720 Ch 4.092 Bore Dual Valve Pocket (late 14 and early 22 degree heads) Includes Pins 1/16 1/16 3/16 Ring Size Rings not included Stock rods...More Details »
Item #: ROS-BU3754092-8
Condition: New
Price: $799.95


Description: Quick Ship from Butler Ross Racing Pistons 3.75 Stroke 1.720 Ch 4.122 Bore Dual Valve Pocket (late 14 and early 22 degree heads) 1/16 1/16 3/16 Ring Size Includes Pins Rings not included Stock rods...More Details »
Item #: ROS-BU3754122-8
Condition: New
Price: $799.95


Description: Quick Ship from Butler Ross Racing Pistons 3.75 Stroke 1.720 Ch 4.150 Bore 1/16 1/16 3/16 Ring Size Includes Pins Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU3754150-8
Condition: New
Price: $749.95


Description: Quick Ship from Butler Ross Racing Pistons 4.250 Stroke 1.295 Ch 4.092 Bore Dual Valve Pocket (late 14 and early 22 degree heads) Includes Pins Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU4254092-8
Condition: New
Price: $1,117.95


Description: Quick Ship from Butler Ross Racing Pistons 4.250 Stroke 1.295 Ch 4.122 Bore 1/16 1/16 3/16 Ring Size Includes Pins Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU4254122-8
Condition: New
Price: $749.95


Description: Quick Ship from Butler Ross Racing Pistons 4.250 Stroke 1.295Ch 4.150 Bore (.057" over 421) 1/16 1/16 3/16 Ring Size Pins and rings not included
Item #: ROS-BU4254150-8
Condition: New
Price: $749.95


Description: Quick Ship from Butler Ross Racing Pistons 4.250 Stroke 1.295Ch 4.150 Bore (.057" over 421) 1/16 1/16 3/16 Ring Size Pins and rings not included
Item #: ROS-BU4254150-8
Condition: New
Price: $749.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 3.75 Stroke 1.720Ch 4.150 Bore 1/16 1/16 3/16 Ring Size Includes Pins Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU3754150-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 3.750 Stroke 1.720Ch 4.092 Bore 14 and 22 Degree Heads 1/16 1/16 3/16 Ring Size Pins Included Rings not included Stock...More Details »
Item #: ROS-BU3754092-DS-8
Condition: New
Price: $999.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 3.750 Stroke 1.720Ch 4.122 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU3754122-DS-8
Condition: New
Price: $999.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.210 Stroke 1.495Ch 4.181 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4214181-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.210 Stroke 1.495Ch 4.211 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4214211-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.092 Bore Late 14 and early 22 degree heads 1/16 1/16 3/16 Ring Size Pins Included Rings not...More Details »
Item #: ROS-BU4254092-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.122 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included Stock rods small end must be narrowed for use with these pistons
Item #: ROS-BU4254122-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.150 Bore (.057" over 421) 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254150-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.150 Bore (.057" over 421) 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254150-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.155 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254155-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.160 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254160-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.181 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254181-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.191 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254191-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Custom Dish CC CNC Milled at Butler 4.250 Stroke 1.295Ch 4.211 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254211-DS-8
Condition: New
Price: $949.95


Description: Quick Ship from Butler Ross Racing Pistons Thick Flat Top 4.250 Stroke 1.295Ch 4.160 Bore 1/16 1/16 3/16 Ring Size Pins Included Rings not included
Item #: ROS-BU4254160-8
Condition: New
Price: $749.95


Description: Quick Ship from Butler Ross Racing Pistons 4.250 Stroke 1.295Ch 4.191 Bore 1/16 1/16 3/16 Ring Size Pins and rings not included
Item #: ROS-BU4254191-8
Condition: New
Price: $749.95


Description: .980" Tapered Wall Choose 2.500" or 2.930" Length Set/8 2.930"- 980-01-29-8 141 grams 2.500"- 980-01-25-8 124 grams
Item #: ROS-980
Condition: New
Price: $129.95


Description: .990" Tapered Wall Choose 2.500" or 2.930" Length Set/8 2.930"- 990-01-29 2.500"- 990-01-25 2.930" Bearing Steel- 990-15-29 2.750" H13 Tool Steel- 990-07-27
Item #: ROS-990
Condition: New
Price: $99.95


Description: Replacement spiral locks for Ross pistons with .980 or .990 pin (set)
Item #: ROS-4004E-33
Condition: New
Price: $27.95
Qty:

Description: ROSS/ BUTLER 4.181 X 1.495 CH Flat Top Forged Pistons 1/16 1/16 3/16 Rings .980 X 2.500 Pin (For 4.210” stroke/6.625 Rod) Set/8
Item #: ROS-BU4214181-8
Condition: New
Price: $749.95


Description: ROSS/ BUTLER 4.211 X 1.495 CH Flat Top Forged Pistons 1/16 1/16 3/16 Rings .980 X 2.500 Pin (For 4.210” stroke/6.625 Rod) Set/8
Item #: ROS-BU4214211-8
Condition: New
Price: $749.95


Description: ROSS/ BUTLER Moved down (deeper) (.320) ring grooves for early 400 blocks with deep notches or used in boost/nitrous applications 4.155 X 1.295 CH Flat Top Forged Pistons 1/16 1/16 3/16 Rings .990...More Details »
Item #: ROS-BU1295-4155-FT-ORS
Condition: New
Price: $1,249.00


Description: ROSS/ BUTLER 4.155 X 1.295 CH Flat Top Forged Pistons 1/16 1/16 3/16 Rings .990 X 2.500 Pin (For 4.250” stroke/6.800 Rod) Set/8
Item #: ROS-BU65532-8
Condition: New
Price: $749.95


Items 1-30 of 34

More About Ross Racing Pistons

Frequently Asked Questions

Do rings come with the pistons?

Rings are sold separately, so you can choose the material and gap for your application. Note your intended use, and the Butler tech will confirm ring recommendations for your Ross Racing pistons.

What if rods need modification?

You can flag it in the order notes. Afterward, the tech will advise on wrist pin size or small-end work during review. Expect a technician to call within one business day.

How does the order review work?

After you submit an order, a technician reviews the specs and any notes you provided. The review covers wrist pin choice, ring-pack preference, crown selection, and any machining requests.

Do these Ross Racing Pistons include piston pins?

Yes. Many Pontiac Ross Racing Pistons come with matching piston pins to help ensure proper fitment and compatibility during engine assembly. Be sure to review the individual product description to confirm the included components for your selected piston set.

How do I choose the correct Ross Racing Pistons for my Pontiac engine?

Selecting the right pistons depends on your engine's specifications, including bore size, compression ratio, stroke, and intended use. Carefully compare your engine requirements with the product specifications to find the appropriate option.

Are these pistons suitable for both street and racing applications?

Pontiac Ross Racing Pistons are available in configurations designed for a variety of performance goals. Depending on the model you choose, they can be well suited for street-driven muscle cars or dedicated racing engines.

Are Ross Racing Pistons available in different sizes and configurations?

Yes. Pontiac Ross Racing Pistons are offered in a range of piston designs, sizes, compression ratios, and configurations to accommodate different engine combinations