Mechman 400 Amp Elite Series Cast Alternator for 1999-2018 GM TruckMechman 400 Amp Elite Series Cast Alternator for 1999 2018 GM Truck (Silverado Sierra) The Elite series 400 amp alternator offers great amperage output and durability at a great price. 6 phase technology, combined with massive twin rectifier assemblies and 12 huge diodes make these alternators totally durable for daily use. These impressive alternators produce 180+ at engine idle RPM and 400+ amps at cruising speeds HOT RATED. Like most high output

120 Wall DOM Tubing

300" 224 cfm

as well as the 2019+ L84 and L87 engines

Full 1 5/8" Primaries

this kit gives you everything you need (except the drop spindles

Part Number 300-123BK Brand Holley Engine Type Gen III/Gen IV Port Style Cathedral Throttle Body Port 105mm RPM Power Band 1500-7000

PCV can set up with -AN or OEM quick connect inlet from valley cover using included adapter

shot-peened

(1) Front Timing Cover Gasket

you’ll need drop spindles

Teflon Guide Bushing

NOTE: THE WALBRO F90000274 AND F90000267 FUEL PUMP FLOW RATES AND PHYSICAL DIMENSIONS ARE IDENTICAL