B3213R Manifold Heat Exchanger 50 520 530 Fits John Deere B3213R Fits JD 006One New Aftermarket Replacement Manifold Heat Exchanger Fits John Deere Tractors This aftermarket replacement manifold heat exchanger is Fits John Deere (Fits JD) 50, 520, and 530 gas tractors. It mounts between the intake and exhaust manifold sections and transfers heat to aid fuel vaporization in the manifold assembly. Note: clamp is not included use clamp and stud part A4645R, sold separately. Compatible Models Fits John Deere (Fits JD) Gas