Blog | OneFastShop Performance Auto Parts News and Tips

AEM X-Series wideband AFR gauge kit with oxygen sensor, harnesses and weld-in bung

Aug 25, 2026 13 min read

Wideband AFR Gauges: How to Know Your Tune Is Not Running Lean

Most tuned N55, B58, S55 and S58 BMWs already log lambda from their factory wideband sensors through MHD or bootmod3. Here is how lambda and AFR differ on...

Fuel

Nov 5, 2025 11 min read

A Deep Dive Into OneFastShop's CNC Billet Fuel Pump Bracket for 39mm Pumps

Which pumps our CNC billet 39mm fuel pump bracket fits (Walbro 450, 525, 535, DW200 to DW420), why the 46mm DW400 will not, how it compares with Radium, DeatschWerks and 034Motorsport options,...

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Blog | OneFastShop Performance Auto Parts News and Tips

Wideband AFR Gauges: How to Know Your Tune Is Not Running Lean

A Deep Dive Into OneFastShop's CNC Billet Fuel Pump Bracket for 39mm Pumps

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