Address
304 North Cardinal St.
Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Choose JA for top-quality forged pistons and connecting rods from China. Upgrade your ride with confidence.
- 21+ years forged pistons and rods manufacturing experience
Mature forging technology, higher performance and more durable forged pistons and rods
Quality can replace the world’s top brand, but forged piston connecting rod price is less than halfSupport on installation technology and custom-made forged pistons and rods
Used by many modified and racing cars to help you win the race game
Longjian Modified Auto Part(JA Modified) Pistons and Rods
Longjian Modified Auto Part(JA Modified) supply the best quality forged piston, connecting rod, pin, ring and engine accessories.
01-Forged Pistons
Looking for high-quality forged pistons for your high performance engine? Look no further than JA Piston, manufactured by Longjian Modified Auto Part (JA Modified), the oldest forged piston manufacturer in China. Our forged pistons are made using 4032 and 2618 aluminum alloys, designed to be lightweight and feature special oil holes and thinner piston rings for superior performance under high temperature and high pressure conditions. With a longer service life and higher compression ratios, JA Piston helps your engine output more power, making every ride a winner.
At JA Piston, we have the most complete stock of forged pistons available for quick shipping. We also offer complete development and manufacturing services, from engineering design to mass production, with a custom piston turnaround time of just 30-45 days. Choose JA Piston for unmatched quality and performance.
02-Forged Rods
Looking for the best forged connecting rods for your high-performance engine? Look no further than JAmodified! Our 20+ years of experience in the industry has allowed us to perfect our design and manufacturing processes, resulting in precision-formed rods that deliver maximum power, torque, and acceleration.
At JAmodified, we understand the unique demands of high-performance engines, and we’ve tailored our processes to meet those demands. Our rods are made from high-quality materials and are designed to withstand the explosive force and horsepower requirements of your engine. Plus, our one-step manufacturing process reduces weight while increasing strength, giving you an edge on the competition.
We take quality seriously at JAmodified, and that’s why every rod undergoes 100% inspection using advanced techniques like magnetic particle inspection and electric indexing head three coordinates. We stand behind our products and are committed to delivering personalized, durable, high-precision, and quality-assured products that exceed your expectations.
Choose JAmodified for your forged connecting rod needs and experience the ultimate in performance, reliability, and customer satisfaction.
03-Stroker Kits
As a Stroker Kits manufacturer, we take great pride in introducing our product to you. Our Stroker Kits are meticulously crafted with top-quality materials and expert workmanship to provide exceptional performance and reliability for your engine.
JAmodified is our brand that manufactures Stroker Kits, and it embodies our commitment to excellence in material quality and professional craftsmanship. We guarantee to deliver optimal performance for your engine. Our Stroker Kits undergo rigorous testing to ensure they can withstand high pressure and loads while offering outstanding acceleration and throttle response.
Our Stroker Kits are compatible with various engine types and brands, offering an array of specifications and options to suit your needs and requirements. Whether you’re looking for more horsepower and torque or improved fuel efficiency and reliability, our Stroker Kits are the perfect solution.
Choose JAmodified’s Stroker Kits for your engine to achieve peak performance. Please don’t hesitate to contact us for more information about our products.
04-Engine Accessories
Welcome to JAmodified! We specialize in designing and customizing high-performance engine components for your vehicle. Our pistons and connecting rods are manufactured using high-quality materials and advanced techniques to enhance your engine’s power, torque, and acceleration. As a leading manufacturer of custom engine parts, we are committed to providing personalized, durable, high-precision, and quality-assured products to meet all of your needs and requirements. We also offer professional technical support and services to ensure you can fully unleash your car’s potential. Choose JAmodified for quality and reliability, and take your vehicle to the next level!
Featured Products
Testimonial
"JAmodified has been invaluable to our racing program. Their ongoing enhancements to the construction and design of their forged pistons have significantly improved the reliability and performance of our 4,000 horsepower supercharged alcohol engines. From the initial design concept and selection of specialty alloys to their full CAD-CAM capabilities and production of fully finished prototype parts, JAmodified has quickly established themselves as a leader in piston technology."
Kevin Tillis
Engineer
WHY CHOOSE US
Quality and Precision
Emphasize the high quality and precision machining of your forged pistons and connecting rods, and how they meet or exceed industry standards.
Broad product line
We offer various types of engine forged pistons and connecting rods.Such as VW、BMW、Toyota、Subaru、Honda......
Experience and Expertise
Highlight your rich experience and deep expertise in manufacturing high-performance engine components, which can enhance potential customers' confidence.
Customization and Flexibility
Stress your ability to provide customized solutions that meet specific customer needs, offering flexibility that sets you apart from competitors.
Innovation and Technology
Showcase your commitment to innovative technology and the use of advanced techniques in the production process, providing customers with cutting-edge solutions.
Customer Support
Highlight your commitment to customer support, including detailed installation instructions and technical assistance, which can enhance the customer experience.
Reliable Delivery
Assure customers of your efficient logistics and timely delivery, ensuring that their orders reach them quickly and safely, no matter where they are located.
Competitive Pricing
Emphasize your competitive pricing for high-quality products, providing customers with cost-effective solutions.
Application Segment
Versatile Forged Pistons and Rods for Diverse Applications by “JA MODIFIED AUTO PARTS”
Discover the wide range of applications for our high-performance forged pistons, durable connecting rods, and premium engine accessories at JA MODIFIED AUTO PARTS. Catering to various sectors such as automotive racing, street performance, and heavy-duty engines, our precision-engineered components are designed to exceed expectations.
