Big Block Chevy Engine Parts & Performance Upgrades

Holley BBC Mid-Mount Accessory Drive

The Mid-Mount complete accessory system has all accessories pulled in tighter than other accessory drives.
Bracketless accessory mounting with ultra-easy assembly
O-ring seal to engine
Hidden thermostat bypass and heater hose ports with NPT line adapters included
LT1 style premium alternator
LT1 style water pump design
Compact SD7 A/C compressor with line adapter included
Type II power steering pump with baffled reservoir
P/S adapter hardline to AN -6 adapter included
OE pulley ratios for optimal accessory performance
Available in natural and black finishes
Billet alternator, tensioner, and compressor pulley covers

300-961/963/964 are designed for 1965 & later MKIV-MKVI 9.80” deck height BBC engines with standard rectangle-port cylinder heads
2.40” tall x 1.60” wide port flange openings, uses Mr. Gasket intake manifold gasket #5817
Plenum Top Gasket Type – 3/32” Round O-ring Cord
Black anodized EFI fuel rails are machined for -10AN O-ring fittings
MAP sensor port is for a GM Gen IV LS MAP sensor
The BBC Hi-Ram is available in either a traditional Hi-Ram 105mm or a 2 x 4150 4-barrel throttle body plenum top
Uses drive by wire or cable actuated GM Gen IV LS 4-bolt throttle bodies
The coolant outlet is a standard Chevy thermostat housing flange
Requires the use of early type GM or small cap MSD or Holley Distributors
Power Band: 1500-8000 RPM
Cast 356-T6 Aluminum Construction, Natural, Satin As-Cast Aluminum Finish

Sniper 2 EFI Bundle includes a Power Distribution Module (PDM), HyperSpark 2 ignition box, coil, and a Chevrolet distributor
Supports up to 650 hp naturally aspirated or 575 hp boosted with (4) 100 lb./hr. injectors
Billet aluminum construction unit plugs directly into the main harness and features a Hall Effect crank trigger for a noise free RPM signal to the ECU
Ignition box keeps all the features of its predecessor in a compact design to provide a clean installation, precise timing control, and consistent spark energy
Integrated ignition coil bracket simplifies mounting the ignition coil while delivering up to 150 mJ of spark energy per second
Patented clear installation cap eliminates confusion while installing the distributor with a marking indicator
Power Distribution Module (PDM) was designed to keep your installation stress free by listing a wiring diagram to connect your system to dedicated circuits
Next generation ECU features improved RF noise and interference resistance
Geometrically redesigned throttle shaft and plate for a smoother throttle feel
Integrated transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications
Cast-in fuel crossover from the primary to secondary fuel rail
Only (4) wiring connections required; the Battery+, Battery-, Switched Ignition, and RPM