LS ENGINES

A quick break down of the Varients, Displacement, Bore & Stroke, HP/TQ, and Compression Ratios.

LS Torque Specs

LS, 2004 and Later

ARP Head Studs

& ARP Hardware

PN: 234-4345

Two style kits were manufactured (Smooth & Stamped) Washers

Standard (Smooth)

(Stamped)

GEN: III/IV

Smooth

Stamped

LS, 2003 and earlier

ARP Head Studs

PN: 234-4110

Two style kits were manufactured (Smooth & Stamped) Washers

Standard (Smooth)

(Stamped)

GEN: III

Smooth

Stamped

Socket Sizes:

9/16 12pt, 3/8 12pt, 3/16 Allen, 1/8 Allen

Socket Sizes:

5/8 hex, 1/2 hex, 1/8 Allen, 3/16 Allen

ARP CON ROD BOLTS

LS, except LS7 & LS9

Gen III/IV & 6.2L LT1

PN: 234-6301

Stock "Cracked rod cap" Rods

Socket Size: 3/8 12pt

ARP MAIN STUDS

LS, 6-Bolt Main, Except 6.2L

4.8, 5.3, 5.7, 6.0L

PN: 234-5608

Socket Sizes: 16mm 12pt, 14mm 12pt, 10mm 12pt, 4mm Allen

6 bolt Main LS Series small blocks

Excluding 6.2L Blocks

ARP Converter Bolts

10mm x 1.5, Hex, 8740 Chromoly,

200-4R, 700R4, 4L60, 4L60E, 4L80E

PN: 230-7304

Set of 3, Depends on Converter if you need 6 or 3.

Socket Size: 13MM Hex

These are 8740 chromoly steel and feature 200,000 psi tensile strength

According to this chart these 10mm bolts torque to 62 FT/LBS

First torque all to 40ft/lbs, then 62 ft/lbs

FORD 8.8 REAR END RPO CODES & MAKES/MODELS

The ford 8.8 is the perfect junkyard pick to choose for building an affordable but reliable rear end for your drag racing build.

Axle Codes Door Stickers:

If you look at the ‘AXLE’ section on the label above(Bottom Right), you’ll see that this Ranger has a ‘F7’ axle code.

Using the chart to the right, we know that this axle is a 7.5-Inch axle with a 4.10 limited slip.

In the Rangers 4.56 geared axles ’99-up are 31-spline.

This page is a work in progress and info will be added over time!