FAST DELIVERY
Enginetech Engine Premium Piston Ring Complete Set M41258-STD for 4.125-Inch Diameter Engines
100% ORIGINAL AND QUALITY
EASY RETURN
- Description
- Fitment
- Warranty and Refund
- Reviews
Engine Premium Piston Ring Complete Set
The Enginetech M41258-STD engine piston ring set is designed for high-performance engine rebuilds, offering reliable sealing and optimal engine efficiency. Crafted with precision, this complete set includes top compression rings, second compression rings, and oil rings, all engineered to meet strict SAE guidelines. The top and second compression rings feature a thickness of 5/64 inches, providing durability and effective compression, while the oil ring measures 3/16 inches for excellent oil control. The ring outside diameter is 4.125 inches, ensuring a perfect fit for compatible engine cylinders. Built by Enginetech, a family-owned company operating since 1982, this piston ring set is ideal for both import and domestic engine rebuild projects, whether restoring an older engine or optimizing a performance build.
Constructed with high-quality materials, the M41258-STD set guarantees consistent end gaps and precise tolerances, which are critical for maintaining optimal compression and preventing blow-by. Enginetech’s commitment to quality ensures that each ring set undergoes rigorous testing to meet industry standards. As a trusted supplier to engine rebuilders nationwide, Enginetech provides parts that are engineered specifically for durability and longevity. This piston ring set is compatible with engines requiring a 4.125-inch ring outside diameter, making it a versatile choice for a range of automotive applications.
Whether you are restoring a vintage engine or building a performance machine, the Enginetech M41258-STD piston ring set offers dependable performance and easy installation. Designed for professionals and hobbyists alike, this set is a vital component in achieving a properly sealed, efficient, and long-lasting engine. Trust Enginetech’s expertise and commitment to quality to ensure your engine rebuild project is successful, providing peace of mind and excellent engine performance for miles to come.
Features:
- Top Compression Ring Thickness: 5/64 inch for durability and effective sealing
- Second Compression Ring Thickness: 5/64 inch for reliable compression
- Oil Ring Thickness: 3/16 inch for efficient oil control
- Ring Outside Diameter: 4.125 inches ensuring proper fit
- Engine rebuild compatibility for import and domestic engines
- Engineered for consistent end gaps following SAE guidelines
- High-quality materials designed for longevity and performance
- Ideal for professional engine rebuilds and performance applications
| Top Compression Ring Thickness: 5/64 in |
| Second Compression Ring Thickness: 5/64 in |
| Oil Ring Thickness: 3/16 in |
| Ring Outside Diameter: 4.125 |
| Aaiaid Part Number: BBPTM41258-STD |
| Part Number: M41258-STD |
| Brand Aaia: BBPT |
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.









