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Increase your engine's efficiency with the N52 Underdrive Pulley. The 170mm diameter power steering pulley reduces parasitic drag by 35%, giving you more power to use where it matters - the wheels. Designed for n52 e9x cars and replaces OEM part number 32427537862. Upgrade to maximize performance.
Works with existing belt size, but check
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emailed to return it with 2 follow up messages and never got back to me, awful customer service
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MR · August 2, 2026
Really neat addition to you track build. Mine is installed on a 128i. Easily remove your idler pulley and adjust hard line on power steering pump to clear new drive system.
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Konner · March 12, 2026
Great quality and careful packaging. Even included freebies. This brand is awesome.
