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The ARM Motorsports B58 charge pipe replaces the plastic factory pipe on Gen 1 B58 engines with mandrel-bent T6061 aluminum. It steps from 2.5 inches at the intercooler to 3 inches at the throttle body, with CNC-machined ends for a precise seal. Three 1/8-inch NPT bungs let you add methanol, nitrous, a boost tap or a smoke test. It suits tuned M240i, 340i, 440i, 540i, 640i and 740i owners who want a sturdier pipe than the OEM plastic one.
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This charge pipe replaces the factory piece on the Gen 1 B58 engine. It is made from mandrel bent T6061 aluminum, with CNC machined connections at the throttle body and the intercooler for a precise seal. The pipe steps from 2.5" on the lower section to 3" on the upper section.
A CNC machined flange keeps the OEM MAP/TMAP sensor in place, and the OEM metal C-clip continues to secure the throttle body connection. Constant-tension T-bolt clamps hold the silicone joint.
The Tri-Port design has three 1/8" NPT bungs. They can be used for methanol or nitrous hookup, a boost tap, or smoke testing. This pipe is built for the Gen 1 B58 only and does not fit Gen 2 engines.
