KYB 344455 Excel-G Rear Shock Absorber 2003-2006 G35 Coupe / 350Z Sold Each

Vehicle Fitment

• 2003-2006 Infiniti G35 Coupe (V35, VQ35DE 3.5L V6, RWD, w/Sport Suspension) - Rear, Left or Right
• 2003-2005 Nissan 350Z (Z33, VQ35DE 3.5L V6, RWD) - Rear, Left or Right

Fitment Notes

• Sold individually - two shock absorbers are required for a complete rear axle replacement. Order two units for a full rear installation.
• Position: Rear - fits both left and right sides (same part number for both sides).
• Infiniti G35 Coupe fitment is specific to vehicles equipped with the Sport Suspension package. G35 Coupe models without the Sport Suspension option use a different rear shock absorber specification - confirm your vehicle's suspension configuration before ordering.
• Infiniti G35 Sedan (V35) is not confirmed for this part number. The G35 Sedan uses a different rear suspension layout and should be verified separately using the KYB online catalog or VIN-based fitment check.
• Nissan 350Z fitment is confirmed for 2003-2005 (DE engine, pre-facelift). Fitment for the 2006-2008 350Z (which received revised suspension with the HR engine facelift) should be verified with the KYB catalog before ordering.
• The Nissan 350Z and Infiniti G35 Coupe share the FM (Front Mid-ship) platform and rear multi-link suspension architecture, making this shock absorber a confirmed cross-application part for both platforms in the years listed.

Features

• OEA (Original Equipment for the Aftermarket) classification - built on the same KYB production lines with the same components and processes used to manufacture KYB's global OEM shocks for Nissan and Infiniti at the factory.
• #1 Recommended Original Equipment Replacement for Asian vehicles - KYB's preferred specification for restoring original ride and handling on Nissan and Infiniti sport platforms.
• Vehicle-specific, hand-assembled damping valves - calibrated precisely to the FM-platform Z33/V35 rear multi-link suspension geometry to manage tire contact, steering response, and body movement as originally engineered by Nissan.
• Nitrogen gas-charged twin-tube design - provides consistent damping throughout the full stroke range, eliminating oil aeration and performance fade caused by conventional non-gas shock absorbers, even under spirited driving conditions.
• One-way anti-foaming valve - minimizes fluid foaming and aeration for consistent damping performance during sustained hard driving, track use, or repeated rapid compressions.
• Triple-lip synthetic fluid seal with integral wiper - multi-lip construction keeps hydraulic fluid contained and road contaminants excluded, significantly extending service life over single-lip alternatives.
• Triple chrome-plated piston rod - ultra-smooth surface finish reduces seal friction and wear for quiet, consistent operation over the full service life of the shock.
• Seamless extruded steel inner cylinder - eliminates leak points associated with seam-welded construction, maintaining consistent internal pressure and fluid containment.
• PTFE-banded piston - creates a positive, low-friction seal against the cylinder wall for precise, controlled damping throughout the stroke range.
• Thickest and strongest shock body and bracket in the industry - minimizes structural flex to maintain correct rear suspension alignment geometry under all cornering, braking, and track load conditions.
• Electronic Stability Control (ESC) and VDC (Vehicle Dynamic Control) compatible - restores the suspension behavior that Nissan/Infiniti's VDC, ABS, and traction control systems are calibrated to work with.
• Lifetime Limited Warranty to the original vehicle purchaser - covers defects in materials and workmanship for as long as the original purchaser owns the vehicle.

Specifications

• Part Number: 344455
• Series: Excel-G
• Type: Shock Absorber (Rear)
• Position: Rear - fits both Left and Right sides
• Design: Nitrogen gas-charged, twin-tube
• Extended Length: 19.92"
• Compressed Length: 14.21"
• Stroke Length: 5.71"
• Upper Mount Type: S1
• Lower Mount Type: Special
• Piston Rod Finish: Triple chrome plated
• Inner Cylinder: Seamless extruded steel
• Piston: PTFE-banded
• Seal: Triple-lip synthetic fluid seal with wiper
• Quantity: Sold individually (2 required per vehicle)
• Platform: Nissan FM (Z33 / V35) - Nissan 350Z / Infiniti G35 Coupe
• Engine: VQ35DE 3.5L V6
• Warranty: Lifetime Limited Warranty to original purchaser

Included Components

• 1x KYB 344455 Excel-G Rear Shock Absorber

Product Description

The KYB 344455 is a rear Excel-G shock absorber engineered as an OEM replacement for the Nissan FM-platform sports cars - specifically the 2003-2005 Nissan 350Z (Z33) and the 2003-2006 Infiniti G35 Coupe (V35) equipped with the Sport Suspension package. Both vehicles share Nissan's FM (Front Mid-ship) rear-wheel-drive platform and the same multi-link independent rear suspension architecture powered by the VQ35DE 3.5L V6, making this shock a confirmed cross-application part for both. For the G35 Coupe, Sport Suspension fitment is required - models without the sport option use a different damper specification and must be verified separately. For the 350Z, the 2003-2005 range is confirmed with two trusted sources; the 2006-2008 350Z received revised suspension with the HR engine change, and fitment should be verified using the KYB catalog before ordering. The G35 Sedan uses a different rear suspension layout and is not confirmed for this part number.

The 344455 uses KYB's nitrogen gas-charged twin-tube design, valved specifically for the FM platform's rear suspension geometry to restore Nissan and Infiniti's original tire contact management, body control, and steering response. A one-way anti-foaming valve minimizes fluid aeration during sustained hard driving - a meaningful advantage on a platform commonly used for spirited road driving and track days. The triple chrome-plated piston rod, triple-lip synthetic fluid seal with wiper, and PTFE-banded piston collectively provide long-term leak resistance and consistent damping performance across the full 5.71" stroke. At 19.92" extended and 14.21" compressed, the dimensions match the OEM rear shock specification for these platforms precisely.

KYB classifies the 344455 as OEA (Original Equipment for the Aftermarket), built on the same production lines and to the same standards as the shocks KYB supplies to Nissan and Infiniti for factory installation. It is KYB's #1 Recommended Original Equipment Replacement for Asian vehicles, and it is the preferred choice of professional technicians for restoring the suspension performance of the 350Z and G35 Coupe platforms. Each unit is sold individually - two are required for a complete rear replacement. The 344455 is covered by KYB's Lifetime Limited Warranty against defects in materials and workmanship for as long as the original purchaser owns the vehicle on which the shocks are installed.