JE / SCAT 373699 Flat Top Pistons Rods Imca 355 2BBL 5.7

( Brand: Je / Scat ), ( Manufacturer Part Number: 373699 ), ( Type: Piston ), ( Items Included: Pistons With Rods ), ( Piston Diameter: 4.030 )

Review JE / SCAT Sbc 355 Lightweight Flat Top Pistons 5.7 Rods Imca

The **Je Scat 373699 355 2-Barrel Flat Top Pistons for 5.7L Small Block Chevrolet Engines** are a premium, high-performance component designed to elevate the power, reliability, and longevity of your classic or modified 355 cubic-inch small-block Chevrolet V8. Crafted from **forged 4340 steel**, these pistons are engineered to withstand extreme stress, high compression ratios, and aggressive engine builds, making them an ideal choice for enthusiasts pushing their engines to the limit. The **flat-top design** ensures optimal combustion chamber geometry, promoting better fuel efficiency, smoother operation, and reduced risk of detonation, which is particularly beneficial for engines running on high-octane fuels or forced induction setups. Each piston is **precision-machined** to exacting tolerances, featuring a **dished profile** that enhances volumetric efficiency and combustion stability, allowing for greater power output while maintaining structural integrity. Compatible with **IMCA (International Motor Contest Association) specifications**, these pistons are built to meet the rigorous demands of high-performance racing and street applications alike, offering a robust alternative to cast pistons for those seeking durability and performance. The **2-bolt main cap design** (common in 5.7L small-block Chevy engines) ensures secure rod attachment, reducing the risk of catastrophic failure under heavy loads. Whether you're building a **high-revving street machine, a drag racing engine, or a reliable daily driver with enhanced power**, these pistons provide the strength and precision needed to handle the most demanding applications. Backed by Je Scat s reputation for quality and performance, these components are a trusted upgrade for anyone serious about maximizing their engine s potential.

### **Pros and Cons of Buying JE SCAT 373699 (355 2BBL Flat Top Pistons, 5.7 Rods, IMCA)**

1. **High Performance Potential** These pistons are designed for high-revving applications, making them ideal for forced induction (turbo/supercharged) or high-RPM naturally aspirated builds. The flat-top design allows for better combustion efficiency and increased power output compared to dished pistons in some cases.

2. **Durability and Strength** JE SCAT pistons are known for their robust construction, using high-quality materials like forged aluminum and reinforced designs. The 355 series is particularly well-suited for heavy-duty applications, including street/strip builds and high-performance engines.

3. **Compatibility with 5.7L (350/400) Engines** These pistons are specifically engineered for the 5.7L (350/400) small-block Chevrolet architecture, ensuring proper fitment with stock crankshafts, rods, and block clearances. The IMCA (International Motor Contest Association) certification indicates they meet strict performance standards for racing and high-stress applications.

4. **Flat-Top Design Benefits** Flat-top pistons promote better combustion chamber shape, which can improve efficiency in high-performance engines. They are also easier to machine for custom combustion chambers if needed.

5. **Reputation for Reliability** JE SCAT is a trusted brand in the performance aftermarket, known for consistent quality and durability. Many racers and builders rely on their components for critical engine parts.

6. **Warranty and Support** JE SCAT offers warranties on their pistons, providing peace of mind for buyers. Their customer service and technical support are generally well-regarded in the industry.

7. **Versatility** These pistons can be used in both street and race applications, from daily drivers with forced induction to high-RPM drag racing setups.

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1. **Cost** High-performance pistons from JE SCAT are not cheap. The price point may be prohibitive for budget-conscious builders, especially when factoring in additional costs like rings, pins, and machining.

2. **Requires Proper Engine Setup** These pistons are not drop-in replacements for stock engines. They demand a properly built engine with matching components (crankshaft, rods, bearings, fueling, and cooling) to avoid failure. A poorly matched setup can lead to catastrophic engine damage.

3. **Machining and Installation Labor** Installing these pistons often requires professional machining (decking, honing, ring fitting) and precise assembly. DIY builders may need to invest in labor or learn specialized skills, adding to the overall cost.

4. **Limited Stock Clearances** The flat-top design and high-performance nature of these pistons may reduce stock clearances in the block, requiring careful inspection of the crankshaft, rods, and oil passages to avoid interference.

5. **Fuel and Cooling Demands** High-performance pistons like these require adequate fueling (upgraded injectors, fuel pumps) and cooling (enlarged radiator, upgraded water pump) to prevent overheating or detonation under heavy loads.

6. **Potential for Overkill** If the engine is not being pushed to extreme RPMs or high torque, these pistons may be more than necessary, leading to unnecessary expense without proportional performance gains.

7. **Learning Curve** Building an engine with high-performance pistons involves understanding stress analysis, material fatigue, and dynamic forces. Novice builders may need to consult experienced mechanics or engineers to ensure proper setup.

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JE SCAT 373699 (355 2BBL flat-top pistons for the 5.7L small-block) are an excellent choice for serious builders targeting high-performance applications, whether for forced induction, high-RPM street builds, or racing. Their durability, strength, and compatibility with the 350/400 platform make them a reliable option, but they come with significant costs and require a well-matched engine setup to avoid failure. These pistons are not suitable for casual upgrades or stock-like builds they are best reserved for projects where maximum power and reliability are priorities.

- **Buy if:** You are building a high-performance engine (turbocharged, supercharged, or high-RPM NA) and can afford the cost of proper supporting components (crankshaft, rods, bearings, fueling, cooling). You are either experienced or willing to work with a professional engine builder to ensure correct setup.

- **Avoid if:** You are on a tight budget, building a stock or mildly modified engine, or lack the knowledge/experience to properly assemble and tune a high-performance setup. In such cases, consider more budget-friendly options like stock pistons, aftermarket street pistons (e.g., Crane, Eagle), or lower-cost forged pistons if your goals are less aggressive.

For most serious builders pushing the 5.7L platform to its limits, these pistons are a worthwhile investment but they demand respect and proper engineering to unlock their full potential.

Details:

JE PISTON# 373699. SCAT 5.7 BUSHED RODS. 3/8 CAPSCREW NOLTS. GOOD USED SET 2 SEASONS OLD APPROX 60 RACES.

part #: 373699 prices

• $5.07-$49.99

specifications pistonringro:

• brand: Je / Scat
• mpn: 373699
• type: Piston
• items included: Pistons With Rods
• piston diameter: 4.030

offer pistonringro:

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

general pistonringro:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings

seller pistonringro:

• # reviews: 4128
• rating: 100.0%
• city: Cedar Rapids, Iowa

payments pistonringro:

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

returns pistonringro:

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

shipping pistonringro:

• carrier: UPS
• transit: 3-5 Days
• type: Calculated
• cost: $0.00
• class: Economy
• service: UPS Ground Saver

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