AE NURAL 87-526600-00 Set Pistons Rings Midget Conversion 1275 1380 73.5

( Brand: Ae Nural ), ( Manufacturer Part Number: 87-526600-00 ), ( Part Type: Ring Piston ), ( Vintage Part: Yes )

Review AE NURAL New Set Of Pistons Rings Mg Midget To Conversion 73.5mm

The **AE Nural 87-526600-00 Pistons and Rings Conversion Set** is a meticulously engineered aftermarket upgrade designed specifically for high-performance applications on **Midget 1275cc and 1380cc engines**, particularly those undergoing a **73.5mm bore conversion** a popular modification to enhance displacement and power output. This precision-crafted set combines **forged pistons** with **high-quality cast iron or steel rings**, delivering an ideal balance of durability, efficiency, and performance for both street and track use. The **forged pistons** in this kit are crafted from **high-strength aluminum alloys**, ensuring superior heat dissipation and resistance to warping under extreme loads, which is critical for engines running at elevated RPMs or with forced induction. The **73.5mm bore conversion** allows for a slight increase in displacement while maintaining structural integrity, making it a favored choice among tuners looking to maximize power without compromising reliability. The accompanying **compression and oil control rings** are designed to minimize blow-by, optimize lubrication, and reduce friction, ensuring long-term engine protection and peak efficiency. Whether installed in a **Midget 1275cc engine** for a modest power bump or in a **1380cc conversion** for serious performance gains, this set is engineered to meet the demands of aggressive driving, high-revving applications, and even mild forced induction setups. Built to exacting tolerances, the **AE Nural conversion pistons and rings** are a trusted solution for enthusiasts seeking a reliable, high-performance upgrade that bridges the gap between stock reliability and serious power potential.

### **Pros and Cons of buying a AE Nural 87-526600-00 Set (Pistons, Rings, Midget 1275/1380 Conversion, 73.5mm Bore)**

1. **Compatibility with Common Engines** The 73.5mm bore size is widely used in small-block Chevy engines (e.g., 305, 327, 350) and other popular V8 applications, making it a versatile choice for builds or restorations.

2. **Midget Conversion Ready** The kit includes components designed for a **1275/1380 cc displacement conversion**, which is useful for engines originally built with smaller displacement (e.g., 305ci) but needing a slight increase in volume for performance or compliance with modern regulations.

3. **High-Quality Materials** AE Nural (a brand under **AE Performance**) is known for using forged pistons and high-quality rings, which can improve durability and performance compared to cast alternatives.

4. **Balanced Power Potential** The 73.5mm bore is a good middle ground large enough for meaningful power gains but not so extreme that it requires major block reinforcement or custom machining.

5. **Aftermarket Support** AE Performance parts are widely available through dealers, online retailers, and performance shops, ensuring easy access to gaskets, bolts, and other necessary components.

6. **Potential for Increased Compression** A slightly larger bore (compared to stock) can allow for higher compression ratios, which may improve fuel efficiency or power output when paired with the right camshaft and tuning.

7. **Cost-Effective Upgrade** Compared to full engine rebuilds or custom machining, this kit provides a straightforward way to modify displacement without major structural changes.

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1. **Limited Displacement Increase** The **1275/1380 cc conversion** is a modest bump, meaning power gains may be modest unless paired with other upgrades (e.g., high-flow heads, forced induction, or a performance cam).

2. **Block Strength Considerations** If the engine block is weak (e.g., iron with thin walls or stress risers), a bore increase could lead to warping or cracking under high RPM or forced induction. A stress analysis or reinforcement (e.g., cross-bolted main caps) may be necessary.

3. **Ring and Piston Clearances** The **Midget conversion** may require careful attention to ring end gaps and piston-to-wall clearances, especially if the block has been previously modified or is worn. Incorrect clearances can lead to oil consumption or premature wear.

4. **Potential for Higher Oil Consumption** Larger bores and higher compression can sometimes increase oil burning, particularly if the rings or cylinder walls are not properly matched.

5. **Compatibility Issues with Stock Components** Some stock crankshafts, rods, or connecting rods may not be ideal for this displacement. A **performance rod set** (e.g., ARP, Eagle) might be needed to handle the increased stress.

6. **Tuning Required** A slight displacement change can affect ignition timing, fuel delivery, and exhaust flow. A **dynamic tune** (for fuel-injected engines) or carburetor adjustment (for port-injected) will be necessary to avoid rough running or detonation.

7. **Resale Value Impact** If the engine is modified for a specific application (e.g., street/strip hybrid), the resale value may be lower than a stock or mildly tuned engine, depending on the market.

8. **Potential for Overbuilding** If the rest of the engine (e.g., crank, rods, heads) is not upgraded, the pistons and rings may not fully realize their potential, leading to premature failure under heavy loads.

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The **AE Nural 87-526600-00 piston and ring set** is a **solid mid-range upgrade** for engines needing a **1275/1380 cc displacement increase** (e.g., converting a 305ci to a 327ci-like configuration). It offers **better durability than cast pistons**, **versatile compatibility**, and **modest power potential** when paired with other performance parts. However, it is **not a high-performance solution** on its own it requires careful installation, potential block reinforcement, and tuning to avoid issues.

- **Street/strip engines** where a slight displacement bump is desired without major overhauls.

- **Restorations** where the goal is to modernize displacement while maintaining reliability.

- **Builds with existing strong components** (e.g., forged crank, high-quality rods, performance heads).

- **High-RPM forced induction builds** (unless the block is heavily reinforced).

- **Engines with weak or worn blocks** (risk of warping or failure).

- **Projects where maximum power is the primary goal** (a full performance package would be needed).

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If you are **certain the block can handle the bore increase** (or are willing to reinforce it) and plan to **pair this with other upgrades** (e.g., performance cam, headers, tune), then this kit is a **good value**. However, if your engine is **old, weak, or already near failure**, consider:

- **Sticking with stock displacement** and upgrading other components (e.g., heads, cam, intake).

- **Opting for a more aggressive kit** (e.g., 75mm bore) if you want significant power gains.

- **Getting a block analysis** (via a machine shop) to confirm structural integrity before proceeding.

You need a **modest displacement increase** for a reliable, street-legal engine.

Your block is **strong enough** (or you re willing to reinforce it).

You plan to **upgrade other components** (cam, heads, tune) for balanced performance.

Your engine is **old, weak, or has unknown history**.

You expect **high RPM or forced induction** without reinforcement.

You want **maximum power** without a full engine rebuild.

For most **moderate builds**, this kit is a **practical and cost-effective choice** just ensure the rest of the engine is up to the task.

Details:

These are genuine AE Nural pistons made in Europe. Brand New set of 4 Pistons for MG Midget or Austin Haley Sprite 1275 to convert it a 1380 cc engine. These have a 9cc dish. These are 73.5mm and do require offset boring for best results.

Th EU are a modern low drag three ring piston and come complete with pistons, rings, pins.

part #: 8752660000 prices

• $250.00-$449.95

specifications cranshafengin:

• brand: Ae Nural
• mpn: 87-526600-00
• part type: Ring Piston
• vintage part: Yes

seller cranshafengin:

• city: Knoxville, Tennessee
• rating: 99.8%
• # reviews: 69929

shipping cranshafengin:

• service: Standard
• transit: 3-7 Days
• cost: $15.00
• class: Standard
• type: Fixed

offer cranshafengin:

• quantity: 1
• started: February 23, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

general cranshafengin:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

payments cranshafengin:

• wallet: Apple-pay
• credit card: Diners-club
• other

returns cranshafengin:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

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