Turn the belt. Watch the mechanism respond.
Rotate the front belt drive by hand to move the crankshaft and internal pistons together. A compatible building-block motor can be added separately for powered motion.
ZTART INLINE-FOUR MECHANICAL MODEL SERIES
K20A-Inspired Engine Building Kit
Build a 907-piece K20A-inspired inline-four model with linked belt, crankshaft, and piston motion, metallic-effect detailing, and a bold red DOHC display profile for builders aged 14+.
$69.00
907-piece mechanical build for ages 14+
Moving belt, crankshaft, and pistons
Compatible motor sold separately
Ships from China. Free shipping to the US and Europe. Returns and exchanges supported.
Secure checkout
Free shipping
Free shipping to the US and Europe from China.
Metallic-effect finish
Selected silver and copper-colored elements use metallic paint to bring out the layered mechanical detail.
Returns supported
Returns and exchanges are supported after delivery.
ZTART INLINE-FOUR MECHANICAL MODEL SERIES
K20A-Inspired Engine Building Kit
Build a 907-piece K20A-inspired inline-four model with linked belt, crankshaft, and piston motion, metallic-effect detailing, and a bold red DOHC display profile for builders aged 14+.
Mechanical details
See the belt drive, piston linkage, and K20A-inspired detail up close.
The front belt drive links the crankshaft and internal piston system, turning the finished build into an interactive mechanical display. Operate it by hand or add a compatible building-block motor sold separately.
Red DOHC profile with layered mechanical detail
The red upper cover, exposed front gearing, silver intake and pipework, copper-colored exhaust forms, and stable base create a compact display from every angle.
MECHANISM IN MOTION
Turn the belt and watch the crankshaft and pistons move.
The bold red DOHC cover anchors the design, while exposed gearing, silver intake and pipework, copper-colored exhaust forms, and a stable black base reward a closer look.
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View productA focused four-hour build
A focused four-hour project for mechanical-model fans.
With 907 ABS pieces, a printed instruction manual, and an estimated four-hour assembly time, this kit offers a satisfying technical build for car enthusiasts, collectors, and builders aged 14+.
What is included
907 Pieces
Display Base
Moving Belt Drive
Printed Manual
Retail Box
Metallic-Painted Parts
Specifications
Everything important before checkout.
Pieces
907 pieces
Completed size
26 x 15 x 14 cm
Material
ABS plastic with metallic-painted silver and copper-colored parts
Recommended age
14+
Estimated build time
Around 4 hours
Motion
Belt-driven crankshaft and piston linkage
Motor
Compatible building-block motor sold separately
Product code
PB8860
FAQ
Quick answers before you build.
QHow many pieces are included?
AThe kit includes 907 building pieces.
QWhat are the dimensions of the completed model?
AThe completed model measures 26 x 15 x 14 cm.
QWhich parts move?
AThe belt drive, crankshaft, and pistons move together. The fan is decorative and does not rotate.
QIs a motor included?
ANo. The mechanism can be operated by hand, or powered with a compatible building-block motor purchased separately.
QIs an instruction manual included?
AYes. A printed instruction manual is included in the package.
QHow long does assembly take?
AThe estimated build time is around 4 hours, depending on your experience and pace.
QIs this an officially licensed automotive product?
ANo. This is an independently produced, K20A-inspired mechanical building model and is not officially licensed by or affiliated with any automotive manufacturer.
Start your next build
Build the motion. Display the detail.
The K20A-inspired inline-four combines linked belt, crankshaft, and piston motion with a bold red DOHC profile and metallic-effect mechanical detail.
Need help? Contact us
Questions about product details, shipping, payment, or after-sales support? Contact our customer service team. We usually reply within 24-48 hours.
support@ztarttoys.com