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 LT1 427ci – 4.125 Inch Bore, 4 Inch Stroke, 6.125 Inch Connecting Rod, .927 Inch Pin

Mahle
mhl930173225
Out of stock
Engine
$1,080.97
The Mahle MS Piston Set designed for the GM LT1 427 cubic inch engine offers high-performance...

Mahle MS Piston Set for GM LT1 427ci – 4.125 Inch Bore, 4 Inch Stroke, 6.125 Inch Connecting Rod, .927 Inch Pin

The Mahle MS Piston Set designed for the GM LT1 427 cubic inch engine offers high-performance components for serious automotive enthusiasts and professional rebuilds. These pistons feature a 4.125-inch bore and a 4-inch stroke, providing precise fitment and optimal combustion efficiency. Crafted with advanced coatings including phosphate, Grafal, and a hard anodized top ring groove, they deliver enhanced durability and wear resistance under demanding engine conditions. The set includes pistons with a compression ratio of 12.3:1, ensuring excellent power output and fuel economy. Each piston is engineered for a weight of approximately 8.5 ounces, contributing to balanced engine performance and smooth operation.

Features:

  • Bore: 4.125 inches for precise engine fitment
  • Stroke: 4 inches for optimal piston travel
  • Connecting Rod Length: 6.125 inches for reliable motion transfer
  • Piston Pin: .927 inches diameter for secure attachment
  • Compression Ratio: 12.3:1 for high power output
  • Coatings: Phosphate, Grafal, and Hard Anodized top ring groove for wear resistance and longevity
  • Application: Designed specifically for GM LT1 427 cubic inch engines
  • Weight: Approximately 8.5 ounces per piston for balanced engine dynamics
  • Material: High-quality automotive-grade materials ensuring durability and performance
  • Part Number: Mahle MS Piston Set GM LT1 427ci, part number mhl930173225
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

×