-60%
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 OE Steel Napier Ring Set for THM 4.000 x 1.5mm with .151 RW Plain Rings

Mahle OE
mhl3021204
Out of stock
Engine
$108.66 $42.97
The Mahle OE Steel Napier Ring Set is designed for high-performance automotive applications, specifically for use...

Mahle OE Steel Napier Ring Set for THM 4.000 x 1.5mm with .151 RW Plain Rings

The Mahle OE Steel Napier Ring Set is designed for high-performance automotive applications, specifically for use with THM engines. This set includes precision-machined plain rings made from durable steel, ensuring reliable sealing and longevity in demanding engine environments. Each ring measures approximately 4 inches in diameter with a 1.5mm thickness and features a .151 inch radial width, providing optimal compression and combustion efficiency.

The rings are engineered to meet stringent quality standards, offering consistent performance and fitment. Mahle’s reputation for manufacturing reliable engine components is reflected in this set, which is suitable for professional rebuilds and high-performance engine builds. As a non-CARB approved product, it is intended for applications where certification is not required, emphasizing its suitability for a broad range of automotive projects.

Designed for ease of installation and long-term durability, these steel Napier rings are an excellent choice for engine rebuilders seeking dependable sealing components. The set is compact, containing one complete set of rings, and is ideal for use in engines requiring a precise fit for optimal performance. Trust Mahle OE for quality engine parts that meet the demands of modern automotive repair and performance upgrades.

Features:

  • Material: Steel for durability and reliable sealing
  • Ring Size: 4.000 inches in diameter with 1.5mm thickness
  • Radial Width: .151 inch for optimal compression
  • Design: Plain rings suitable for various engine rebuilds
  • Compatibility: Specifically designed for THM engines
  • Quality: Manufactured to high standards for consistent performance
  • Application: Suitable for professional and high-performance engine rebuilds
  • Certification: Not CARB approved, intended for non-compliant applications
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

×