4WD X-Track

Notable parts

• 15 parts appear in only a few other sets: Technic Axle and Pin Connector Perpendicular 3L with Pin Hole (Red) ×2 — also in 8226 Mud Masher (all Technic); Technic Gear 12 Tooth Bevel (Yellow) ×4 — also in 3578 NHL Championship Challenge, 3579 NHL Street Hockey; Technic Gear 16 Tooth with Round Holes [Old Style] (Red) ×2 — also in 9789-2, 9754 Dark Side Developer Kit; Technic Wedge Belt Wheel [aka Pulley] (Red) ×2 — also in 10358 Transformers: Soundwave, 75452 BB-8; Technic Gear 8 Tooth (White) — also in 8511 Frost, 9786 Robo Technology Set with USB Transmitter; Technic Panel Fairing # 3 Large Long, Large Holes, Side A (Red) — also in 8448 Super Street Sensation, 8436 Truck (all Technic); Technic Panel Fairing # 4 Large Long, Large Holes, Side B (Red) — also in 8448 Super Street Sensation, 8436 Truck (all Technic); Wheel 49.6 x 28 VR with X Axle Hole (Metallic Silver) ×4 — also in 8445 Indy Storm, 8446 Crane Truck, 5219 Silver Wheel Multi Pack (all Technic); Motor, 4.5V 17 x 6 x 5 with Switch, Light Gray Bottom (Black) — also in 5221 Motorised Base Pack, 8307 Stunt Race, 8472 Street 'n' Mud Racer; Technic Block 3 x 5 x 1 2/3 (Red) — also in 8354 Exo Force Bike, 8242 Slammer Turbo, 8353 Slammer Rhino; Technic Bush (Blue) ×4 — also in 8005 Ice Explorer, 9784 Arctic Impact Challenge Kit, 1292 Frost Flyer, 9789-2; Axle Hose, Soft 12L (Pearl Light Gray) ×2 — also in 8537 Nui-Rama, 5220 Vehicle Styling Pack, 8434 Aircraft, 8649 Nitro Menace; and 3 more.
• 11 moulds first came out in 2000, including in this set: Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin ×6; Technic Beam 1 x 4 Thin ×4; Technic Beam 1 x 5 Thick ×4; Technic Brick 4 x 4 with 2 x 2 Opening ×4; Technic Beam 1 x 15 Thick ×2; and 6 more.
• 10 existing moulds first came out in their colour in 2000, including in this set: Hose, Ribbed 7mm D. 7L / 5.6cm (Pearl Light Gray) ×6; Hose, Ribbed 7mm D. 3L / 2.4cm (Pearl Light Gray) ×4; Technic Beam 1 x 9 Bent (7 - 3) Thick (Black) ×4; Technic Bush (Blue) ×4; Technic Gear 12 Tooth Bevel (Yellow) ×4; and 5 more.

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.