Advanced Pro Plus Racing Circuit Spec Coilovers - Nissan 240sx / Silvia 1995-2000 (S14/S15)
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
| FRONT | REAR | |
| SPRING RATES | 14k | 14k |
| UPPER MOUNT | Pillowball w/ Camber Plates | Aluminum w/ Hardened Rubber OR Pillowball |
| STRUT DESIGN | Inverted | Standard |
Application Notes:
- Fits S14 and S15 240sx / Silvia Models
- Please select desired coilover model, 2-way or 3-way when ordering
- Please select desired rear upper mount style when ordering
- Optional Dry Break External Reservoir Connections Available
YSR USA Advanced Pro Plus Circuit Coilover System
Engineered for peak performance on the track, the YSR USA Advanced Pro Plus Circuit Coilover System is our top-tier, motorsport-grade suspension setup, developed specifically for competitive circuit racing. Designed with input from professional drivers and race engineers, this system is available in both 2-way and 3-way adjustable configurations, delivering superior adjustability, consistency, and precision handling under extreme driving conditions.
Whether you choose the 2-way adjustable version (rebound + compression) or the 3-way adjustable version (independent high-speed compression, low-speed compression, and rebound), this system gives drivers total control over suspension dynamics—allowing precise tuning for various circuit layouts, track surfaces, and driving styles.
Each kit is built to order with vehicle-specific valving and spring rates tailored to high-grip tarmac use. Whether you're dialing in balance at a technical course or chasing lap times on a high-speed track, the Advanced Pro Plus Circuit kit gives you the control and feedback needed to push limits confidently.
Key Features:
- 2-Way or 3-Way Adjustable Damping
Choose from:
- 2-WAY EXTERNAL RESERVOIR
2-way adjustable dampers with independent rebound and compression control, ideal for serious track users seeking simplicity with performance.
- 3-WAY EXTERNAL RESERVOIR
3-way adjustable dampers featuring independent 17 clicks of high-speed compression, 20 clicks of low-speed compression and 33 clicks of rebound damping adjustment for maximum fine-tuning.
- 2-WAY EXTERNAL RESERVOIR
- Monotube Damper Design
Delivers consistent performance and superior heat dissipation—critical during extended sessions and endurance racing.
- High-Precision Remote Reservoirs
External reservoirs allow increased oil capacity and thermal stability, ensuring damper performance stays consistent lap after lap
- Custom Spring Rates & Valving
Every kit is tailored to your vehicle and race needs, offering ideal balance, grip, and compliance on tarmac surfaces
- Lightweight Construction
CNC-machined components and aluminum shock bodies reduce unsprung weight without compromising strength.
- Camber Adjustable Top Mounts (on applicable models)
Helps dial in aggressive track alignment setups for maximum front-end grip and tire contact.
Important Considerations When Choosing Circuit Spec Suspension
Pros:
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Choice of 2-way or 3-way adjustment to suit driver needs and tuning complexity
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Consistent, fade-resistant performance during long track sessions
- Built-to-order specs ensure optimal performance for specific vehicle setup and weight
- Improved lap times through superior grip and chassis control
- Enhanced steering feedback and cornering stability at high speeds
- Ideal for time attack, road racing, and professional-level motorsport applications
Cons:
-
Not recommended for street use due to stiffer valving and higher NVH (Noise, Vibration, Harshness)
-
Requires experienced setup and tuning for best results
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Higher cost compared to 1-way systems due to advanced features
- May need frequent adjustments to adapt to different tracks or conditions
- Reduced ride comfort outside of track environments
The Advanced Pro Plus Circuit Coilover System is a purpose-built tool for those who demand uncompromising performance and adjustability on the track. Whether you prefer the efficient control of a 2-way setup or the deep tuning capabilities of a 3-way system, this kit is designed to deliver professional-level handling and feedback for your podium pursuit.
High quality components are adopted to ensure product durability and stability. Each application is test fit and completely road tested to guarantee perfect performance and comfort.
Please note that ALL of our coilovers are hand built and made to order. Please allow 3-4 weeks for delivery.
**Photographs shown are stock photos; Actual items may vary in appearance or features. Please contact us for specific features of each kit.
Fitment: 1995–2000 Nissan 240sx
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.