The Borg Warner 310mm LU (A618, 47RH/RE, 48RE) piston damper cores are becoming scarce. After several rebuilds, the material supporting the friction material becomes weak, and deflection could result in failure. The Sonnax fully machined piston allows for a stronger and more durable replacement. The hardened bore reduces galling of the seal bore. Sonnax piston plate BW-DA-3P adapts to the OE damper assembly using BW-RV-2 rivets.

Machined from a steel billet
Increased wall thickness for greater stiffness
Hardened bore to reduce galling
Lockup surface machined to specific requirements for bonding

More From This Category

Cast Piston

Cast Piston

$92.49

COMP Cams Camshaft, Xtreme Marine, Hydraulic Flat, Advertised Duration 288/304, Lift .570/.575, For Chevrolet Big Block 396-454, Each

COMP Cams Camshaft, Xtreme Marine, Hydraulic Flat, Advertised Duration 288/304, Lift .570/.575, For Chevrolet Big Block 396-454, Each

$591.41

MANLEY Piston, 1.520 in. Compression Distance, 4.600 in. Bore Size, Flat Top, For Chevrolet BB, Each

MANLEY Piston, 1.520 in. Compression Distance, 4.600 in. Bore Size, Flat Top, For Chevrolet BB, Each

$219.04

Motive Gear Getrag 4X4 Rear Seal, Each

Motive Gear Getrag 4X4 Rear Seal, Each

$13.22

QA1 Quick Disconnect Ball Joint, 10-32

QA1 Quick Disconnect Ball Joint, 10-32

$7.78

TCI Torque Converter, Super StreetFighter, 1.85 in. Pilot, For Ford, C-6, Each

TCI Torque Converter, Super StreetFighter, 1.85 in. Pilot, For Ford, C-6, Each

$1,659.53