GM LS Alternator Only Bracket and Adjustable Idler System *Type 1*
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GM LS LQ series "Alternator Only” Bracket and Adjustable Idler system, CNC Machined in the USA from 6061 aircraft grade billet aluminum.
Designed to work with all three LS balancers without spacing the water pump. Select which harmonic balancer you are using from the drop down menu.
Mounts the alternator on the top of driver’s side of the motor
Works with the 145 or 160 amp truck alternator, or the 105 amp LS1 F-Body alternator
Compatible with any LS series engine, because everything bolts to the cylinder head. This includes LQ4, LQ9, LS1, LS2, LS3, LSX, and more.
Places the alternator below an LS1 style intake — lower than any other bracket available! The included idler pulley increases belt wrap on both the crank pulley and alternator pulley, and guarantees you won’t sling a belt off.
The distance from the engine center-line to the outside of the alternator is only 16”. If you need narrower, see the Type 2 bracket which is 1.5" shorter.
This setup retains the factory active tensioner. Make sure you have the same tensioner as the balancer you are using (Truck, LS1 or Corvette). It is compatible with the aftermarket tensioners also.
It can also be used to drive the alternator directly off the crank if using an electric water pump. Flip the slotted idler block over and it can be used as a tensioner on the top of the belt (see photo). Will work with the Meziere electric pump
Important Note: this bracket will not work in a 4th Gen. F-Body with F-Body/LS-1 Balancer. See our fixed idler version for this vehicle.
Important notes about Corvette accessory drive :
The coolant temperature sensor needs to be relocated to the passenger side head when using the Corvette balancer / accessory drive.
Corvette spacing will not work with tall aftermarket valve covers.
You only need to supply the 68.5" 6-rib drive belt (1740mm, Advance Auto part number 685K6 or 6PK1740).
If you are using an electric water pump, the belt you will need is a Dayco 5060495 (49.5")
If you are running an undersized balancer, you will need a shorter belt than listed.