Gift CardContactAbout
0 My Cart

Your cart is currently empty.

Continue shopping
Total: $0.00
View cart
Toggle menu
0
  • Home
  • Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Sold out
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Load image into Gallery viewer, Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Load image into Gallery viewer, Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Load image into Gallery viewer, Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Load image into Gallery viewer, Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Load image into Gallery viewer, Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)

Have Questions?

(425) 295-1665 Ask an Experts

  • 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 Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)

Mahle
mhl930230030
Out of stock
Engine
$962.97
The Mahle MS Pistons designed for Chevrolet LS engines deliver high-performance features suitable for demanding applications....
Mahle MS Pistons for Chevrolet LS 421cid - 4.030-inch Bore, 4.125-inch Stroke, 6.125-inch Connecting Rod, 0.927-inch Pin, -20cc Dish, 9.8 Compression Ratio (Set of 8)
Description

The Mahle MS Pistons designed for Chevrolet LS engines deliver high-performance features suitable for demanding applications. Crafted from high-quality 2618 aluminum, these pistons provide excellent strength and durability while maintaining a lightweight profile to optimize engine efficiency. The 4.030-inch bore diameter and 4.125-inch stroke generate a total displacement of 421 cubic inches, making these pistons ideal for custom builds and high-performance upgrades.
Each piston features a -20cc dish to promote a 9.8 compression ratio, enhancing power output while ensuring reliable combustion. The 0.927-inch wrist pin and 6.125-inch connecting rods are engineered for a secure fit, providing stability under high-stress conditions. Coated with phosphate and Grafal, these pistons offer improved wear resistance and corrosion protection, extending engine longevity.
Engineered specifically for automotive applications, these Mahle pistons are not carb-approved but require carb acknowledgment for legal compliance. They are shipped as a set of eight and are designed to meet the rigorous demands of high-performance LS engine builds. Whether upgrading or rebuilding, these pistons deliver consistent performance, precision fit, and reliable operation for your Chevrolet LS engine.

Features:

  • Material: 2618 aluminum for strength and lightweight performance
  • Bore Diameter: 4.030 inches for optimal engine displacement
  • Stroke: 4.125 inches for increased power
  • Connecting Rod Length: 6.125 inches for balanced operation
  • Wrist Pin Diameter: 0.927 inches for secure fit
  • Dish Volume: -20cc for a 9.8 compression ratio
  • Coatings: Phosphate and Grafal for wear and corrosion resistance
  • Application: Chevrolet LS engines, set of 8 pistons
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

×