1. Producte acabatview
This manual provides essential information for the safe and correct installation, adjustment, and maintenance of your maXpeedingrods Coilover Suspension Kit. This kit is designed to enhance vehicle handling and allow for ride height adjustment.
Compatibilitat:
- Nissan 350Z Coupe/Roadster Convertible RWD (Z33) 2003-2008
- Infiniti G35 Coupe RWD (V35) 2003-2007
- Infiniti G35 Sedan RWD (V35) 2003-2006
- Nissan Skyline Coupe RWD (V35) 2003-2007
Note: Not compatible with AWD models.
2. Informació de seguretat
Automotive suspension work requires specialized tools and knowledge. Improper installation can lead to serious injury or vehicle damage. It is highly recommended that installation be performed by a qualified professional technician.
- Utilitzeu sempre l'equip de protecció individual (EPI) adequat, incloent-hi ulleres i guants de seguretat.
- Assegureu-vos que el vehicle estigui ben recolzat sobre els gats elevadors sobre una superfície plana abans de començar qualsevol treball. No confieu mai només en un gat.
- Refer to your vehicle's factory service manual for specific torque specifications and removal/installation procedures for OEM components.
- Do not modify any components of the coilover kit.
- After installation, perform a full alignment of the vehicle.
3. Contingut del paquet
Verify that all components are present and undamaged before beginning installation. Contact customer support immediately if any parts are missing or damaged.
- 4 x maXpeedingrods Coilover Assemblies (Front and Rear)
- Adjustment Wrenches (for ride height and preload)
- Manual d'instruccions (aquest document)

Figura 3.1: Detallada view of a coilover assembly, highlighting components such as the pillow ball top mount, dust boot, coil springs, 6061-T6 AL perch, anodized shock body, and powder-coated lower mount.
4. Configuració i instal·lació
This section provides general guidelines. Always consult your vehicle's specific service manual for detailed removal and installation procedures of the original suspension components.
- Preparació: Park the vehicle on a level surface, engage the parking brake, and loosen the lug nuts on the wheels. Jack up the vehicle and secure it with jack stands. Remove the wheels.
- Treure la suspensió OEM: Carefully remove the original shock absorbers and springs according to your vehicle's service manual. This typically involves disconnecting sway bar links, brake lines (if necessary), and unbolting the top mount and lower mount.
- Instal·leu nous coilovers:
- Install the new maXpeedingrods coilover assemblies. Ensure the top mount bolts align correctly with the vehicle's chassis mounting points.
- Attach the lower mount to the vehicle's control arm or knuckle.
- Reconnect any disconnected components (sway bar links, brake lines, etc.). Ensure all bolts are tightened to the manufacturer's specified torque.
- Initial Ride Height Setting: Before fully tightening all bolts, set an approximate ride height. Refer to the 'Operating and Adjustment' section for details on adjusting ride height.
- Assemblea final: Reinstall the wheels and lower the vehicle. Torque the lug nuts to specification.
- Post-instal·lació: Drive the vehicle for a short distance to allow the suspension to settle. Re-check all fasteners for tightness. A professional wheel alignment is mandatory after coilover installation.

Figura 4.1: Example of coilover installation. Professional installation is recommended.
5. Funcionament i ajust
Your maXpeedingrods coilovers allow for ride height adjustment. The damping value is preset for consistent performance.
5.1 Ajust de l'alçada de la suspensió
The ride height can be adjusted by twisting the lower mount on the threaded shock body. This allows for a lowering range of 1-3 inches from the original ride height.
- Loosen the lower mount (A) and locking ring (B) using the provided adjustment wrenches.
- Rotate the lower mount (A) to increase or decrease the threaded distance, thereby changing the ride height. Rotating clockwise will lower the vehicle, and counter-clockwise will raise it.
- Once the desired height is achieved, tighten the lower mount (A) and locking ring (B) securely against each other to prevent movement.
- Repeat for all four coilovers, ensuring even height on both sides of the vehicle.

Figure 5.1: Ride height adjustment mechanism showing the lower mount and locking rings.
5.2 Ajust de la precàrrega
The preload on the spring can be adjusted using the locking ring (C) above the spring perch. This adjustment should only be performed by experienced individuals or professionals, as incorrect preload can affect ride quality and handling. The factory preset is generally suitable for most applications.

Figure 5.2: Visual representation of independent ride height and spring tension settings.
6. Manteniment
Regular maintenance ensures the longevity and optimal performance of your coilovers.
- Inspecció periòdica: Periodically inspect all coilover components for signs of wear, damage, or corrosion. Check for leaks around the shock body.
- Neteja: Keep the coilover threads and shock bodies clean from dirt, salt, and debris. A full-length dust boot is provided to protect the piston shafts.
- Comprovació de fixacions: Regularly check the tightness of all mounting bolts, locking rings, and top mount nuts. Re-torque to specifications if necessary.
- Alineació: After any significant ride height adjustment, or if uneven tire wear is observed, have a professional wheel alignment performed.
7. Solució De Problemes
This section addresses common issues that may arise with coilover suspension.
| Símptoma | Causa possible | Solució |
|---|---|---|
| Sorolls inusuals (sorolls, grinyols) | Loose fasteners, worn bushings, improper installation. | Inspect all mounting points and tighten to specifications. Check for damaged bushings. Re-evaluate installation. |
| Alçada de conducció desigual | Incorrect height adjustment, uneven preload. | Re-measure and adjust ride height on all four corners. Ensure preload is consistent. |
| Poor handling or ride quality | Incorrect ride height, improper alignment, damaged components. | Verify ride height settings. Perform a wheel alignment. Inspect coilovers for damage. |
| Shock absorber leaking | Fallada del segell, danys al cos de l'amortidor. | Contact customer support for warranty or replacement options. |
8. Especificacions
| Característica | Especificació |
|---|---|
| Número de model | YH41DW |
| Taxa de ressort frontal | 10 kg/mm (560 lliures/polzades) |
| Taxa de ressort posterior | 7 kg/mm (392 lliures/polzades) |
| Ajust de l'alçada de la marxa | 1-3 cm de rebaixa (des de l'alçada original del vehicle) |
| Damping | Preestablert |
| Top Mount Material | 6061-T6 Aluminum Alloy (Pillow Ball) |
| Material de primavera | 55CrSi Steel (Cold-Bent) |
| Shock Body Finish | Anoditzat amb recobriment anticorrosió |
| Lower Mount Finish | Recobert de pols |
| Pes de l'article | 26650 Grams (Total for kit) |

Figure 8.1: Dimension details for front and rear coilover units, including spring rates.
9. Informació de la garantia
maXpeedingrods products are manufactured to high standards. For specific warranty terms and conditions, please refer to the official maXpeedingrods weblloc web o contacteu directament amb el seu servei d'atenció al client. Conserveu el comprovant de compra per a qualsevol reclamació de garantia.
10. Suport
If you encounter any issues or have questions regarding the installation, adjustment, or performance of your maXpeedingrods Coilovers, please contact maXpeedingrods customer support. Provide your product model number (YH41DW) and purchase details for efficient assistance.
Informació de contacte:
- Visit the official maXpeedingrods weblloc web per a recursos de suport i opcions de contacte.
- Refer to your purchase platform for seller-specific support channels.