Sold out
  • Trusted by Racers

    Professional-grade parts used trackside.

  • Real Support, Real People

    Expert help during business hours.

  • Secure Shopping

    Encrypted checkout & trusted payments.

  • Fast U.S. Shipping

    Orders ship quickly from regional warehouses.

Mahle MS Piston Set for Small Block Chevrolet 420 Cubic Inches - 4.155 Inch Bore, 3.875 Inch Stroke

Mahle
mhl930211355
Out of stock
Engine
$977.97
The Mahle MS Piston Set designed for Small Block Chevrolet engines offers high-performance components for 420...

Mahle MS Piston Set for Small Block Chevrolet 420 Cubic Inches - 4.155 Inch Bore, 3.875 Inch Stroke

The Mahle MS Piston Set designed for Small Block Chevrolet engines offers high-performance components for 420 cubic inch applications. Crafted with a bore diameter of 4.155 inches and a stroke of 3.875 inches, these pistons are engineered to deliver reliable power and durability. The set includes pistons with a 0.927-inch pin diameter, a compression ratio of approximately 10.1:1, and a combustion chamber volume of -22.0cc, making them suitable for performance and rebuild projects.
Constructed with advanced coatings of phosphate and Grafal, these pistons provide enhanced wear resistance and reduced friction, ensuring longevity and consistent engine operation. The pistons are made from 4032 aluminum, a material known for its strength-to-weight ratio, optimizing engine efficiency and responsiveness. Each piston weighs approximately 447 grams, balancing weight and durability for high-stress conditions.
This set includes eight pistons, ideal for complete engine builds or rebuilds, and is designed to meet the demands of performance enthusiasts. The set requires acknowledgment of carburetor compatibility and is not CARB-approved, making it suitable for off-road or racing applications where emissions compliance is not mandatory. Designed with Prop 65 compliance, the Mahle MS pistons ensure safety and quality standards are met for automotive use.

Features:

  • Designed for Chevrolet Small Block engines with 420 cubic inches displacement
  • Bore diameter: 4.155 inches for optimal power and efficiency
  • Stroke length: 3.875 inches for high-performance output
  • Piston weight: approximately 447 grams for durability and balance
  • Coatings: Phosphate and Grafal for wear resistance and reduced friction
  • Material: 4032 aluminum alloy for strength and lightweight characteristics
  • Includes set of 8 pistons suitable for complete engine rebuilds
  • Compression ratio: approximately 10.1:1 for versatile performance
  • Pin diameter: 0.927 inches compatible with standard small block connecting rods
  • Designed with -22.0cc combustion chamber volume for performance tuning
Read More
Read Less

Shipping

Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.

Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.

Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

Your cart

×