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 GM Duramax 403 CID with 4.055-inch Bore and 3.898-inch Stroke

Mahle
mhl930036255
Out of stock
Engine
$2,925.99
The Mahle MS Piston Set, designed specifically for GM Duramax engines, offers reliable performance with a...

Mahle MS Piston Set for GM Duramax 403 CID with 4.055-inch Bore and 3.898-inch Stroke

The Mahle MS Piston Set, designed specifically for GM Duramax engines, offers reliable performance with a 4.055-inch bore and a 3.898-inch stroke. Crafted for high durability, these pistons feature a 6.417-inch connecting rod and a 1.358-inch pin, ensuring precise engine operation. The set includes eight pistons with a compression ratio of 16.3:1, optimized for power and efficiency. Each piston is engineered with a 41.8cc combustion chamber volume and incorporates 0.075-inch deep valve pockets to accommodate your engine's valve configuration. Constructed from high-quality materials, these pistons are lightweight at approximately 774 grams each, contributing to improved engine responsiveness and longevity.

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

×