Developed by Unrivaled Engineering, this low-mount billet serpentine kit provides a compact and reliable alternator mounting solution for Holden 304 and 308 engines. Positioning the alternator low on the driver's side of the engine, this system is particularly popular in Holden Torana applications and other vehicles where engine bay space is limited or a low mount accessory drive arrangement is preferred.
 
CNC machined from high-grade 6061 billet aluminium and supplied with stainless steel hardware, the alternator bracket has been engineered to position the alternator as close to the engine as possible. By minimising bracket offset and overall package size, potential interference with chassis rails, suspension components, and surrounding engine bay structures can be significantly reduced.
 
This system can be configured for use with either a mechanical or electric water pump, making it suitable for a wide range of street, performance, and engine swap applications.
 
The kit is designed to suit Chevrolet-style alternators with 168mm mounting centres, providing access to a wide range of readily available charging options, including high-output units for EFI systems, electric fans, fuel pumps, and other modern electrical demands.
 
Features
CNC machined from high-grade 6061 billet aluminium
Compact low mount driver's side configuration
Designed to position the alternator extremely close to the engine
Supplied with stainless steel mounting hardware
Compatible with Chevrolet-style alternators (168mm mounting centres)
Suitable for standard and high-output alternator applications
 
Why We Use an Eccentric Idler Pulley
Engineered to work with our Unrivaled Engineering Eccentric Idler Pulley system, this design delivers more than just belt adjustment. The eccentric idler introduces a controlled interruption point in the belt path, helping to dampen belt harmonics and reduce belt slap during engine operation. These belt oscillations occur in all belt-driven systems and are commonly encountered at specific RPM ranges, often contributing to premature belt wear, belt loss, and accessory drive instability. By
controlling belt movement and maintaining consistent tension, the eccentric idler improves belt life, reliability, and overall accessory drive performance.
 
Benefits
Maximises engine bay clearance
Ideal for Holden Torana, early chassis Holdens, and other tight engine bay engine swap applications
Compatible with mechanical and electric water pump combinations
Reduced risk of alternator-to-chassis interference
Strong and rigid billet construction
Access to a wide range of readily available alternator options
Clean, purposeful engine bay appearance
 
Fitment
Holden 304 V8
Holden 308 V8
Driver's side low mount configuration
Chevrolet-style alternators with 168mm mounting hole centres
 
Specifications
Material: 6061 Billet Aluminium
Hardware: Stainless Steel
Alternator Type: Chevrolet Pattern
Alternator Mount Centres: 168mm
Mounting Position: Driver's Side Low Mount
 
Variant Options
Finish:
Raw Billet Aluminium
Satin Black Anodised
 
Water Pump Configuration:
Long Water Pump
Short Water Pump
Electric Water Pump (includes shorter belt package)
 
What's Included
Billet alternator bracket assembly
Stainless steel mounting hardware
Eccentric idler pulley assembly
6PK serpentine pulleys
Correct-length 6PK serpentine drive belt
 
Important Notes
This bracket is designed as a low mount alternator system and positions the alternator extremely close to the engine for maximum clearance.
Due to variations between vehicle makes, models, chassis modifications, engine mounts, headers, steering components, and suspension configurations, the end user must confirm suitability for their application prior to purchase.
Compatible with both mechanical and electric water pump combinations.
This bracket does not allow the use of a mechanical fuel pump.
Electric fuel pump conversion is required when using this bracket.
 
 
All Unrivaled billet parts are considered aftermarket and suitable for racing/off road purpose, these are not OEM replacements fitment & vehicle safety is responsibility of vehicle owner. Unrivaled ensure that these parts are to the highest standards and fit the specified engines correctly. Vehicle fitment is responsibility of vehicle owner and pre purchase checking is advised before purchase of any billet aftermarket parts. There is no return on billet parts for change of mind or vehicle fitment issues.