HPI Savage / Savage X / Savage XL K4.6 Alloy Tune Pipe by GPM SAV1308R  [SAV1308R]

Alloy tune pipe for HPI Savage family

This alloy tune pipe is an RC-scale exhaust component designed for the HPI Savage family of nitro trucks. Built as a replaceable tune pipe assembly, it includes the joint and mounting screws to fit directly to the K4.6 engine exhaust flange and the existing manifold layout on Savage, Savage X and Savage XL variants.

Functionally, the part is intended to provide a stable, durable mating surface for exhaust tuning on model engines, helping maintain consistent backpressure and resonance characteristics during setup and running. The alloy construction reduces deformation compared with softer materials, while the supplied joint and screws simplify reassembly after maintenance or upgrades.

Installation notes: confirm alignment between the engine outlet and tune pipe joint before tightening, hand-start the screws to avoid cross-threading, and verify that mating surfaces are clean and free of gasket debris. After initial runs, recheck fastener security and exhaust joint sealing as part of routine RC maintenance.

This GPM tune pipe is a direct aftermarket replacement for Savage-series nitro setups where the K4.6 engine layout is used, offering a straightforward swap and parts-level durability for RC exhaust tuning tasks.