This is a set of two ProTek R/C 1.25" Medium Length Exhaust Manifold Springs intended for use with 1/8 scale nitro engines with mounting tabs on the both sides of the engine case. These springs attach the tuned pipe manifold to the engine case using the spring tabs; if you're engine does not have spring tabs you will need the wrap around style long springs (PTK-7100).Specifications:Length: 1.25" (34mm)Thickness: 0.16" (4mm).
