Upper hose Ø 42x25mm (first model) - ref 0428492800

Length for 4 doors

The kits are supplied with the following components:

• Cylinder Heads (x4)
• Domed Pistons (x4)
• Rings (x12)
• Pin (x4)
• Circle Clips (x8)

Dimensions of the various parts:

• Cylinder Head Bore Diameter: Ø 74.5mm
• Cylinder Head Flange or Top Diameter (D): Ø 89.75mm
• Cylinder Head Base Diameter (A): Ø 80mm
• Overall height including skirts of the sleeves (C): 128mm
• Height from the top of the sleeve to the base gasket area (E): 84.80mm
• Shaft dimensions: Ø 20x63.5mm (Cirlip-free mounting)
• Segment thickness: 1.75mm / 2mm / 4mm (Fireproof/Sealing/Scraper)
• Base gasket type: Paper gasket

Piston mounting direction: an arrow drawn perpendicular to the piston axis is shown on the top of the piston. It must be oriented in the direction of engine rotation during the connecting rod's downward stroke (see manufacturer's instructions or diagram).

It is essential to check the ring end gap of each piston ring before installing them on the pistons, according to the values ​​given by the manufacturer or in the supplied instructions.

During installation, the ring end gap must be evenly distributed around the piston circumference at 120° intervals. 

• This kit contains an M9 adjustment screw nut and an M8 nut.
• To identify a caliper with a square or round seal, refer to the symbol indicated on the caliper casting.
• The "square" symbol indicates the presence of a square seal, while the circle symbol indicates the presence of a round seal.
• It is essential to replace the same type of seal (round or square) according to the symbol on the caliper.
• We recommend that you Check the symbol displayed on each caliper, as a vehicle may have calipers of different origins, some with square joints and others with round joints.
• It is not recommended to mix calipers on the same assembly, as this can lead to the risk of skewing during braking.

Trumpet Thimble Dimensions:

• Inner Diameter: Ø 20.4mm
• Outer Diameter: Ø 30.00mm
• Overall Height: 22.80mm
• Shoulder Outer Diameter: Ø 33.90mm
• Shoulder Height: 3.60mm

Sold in pairs