PerTronix 6651sinst User Manual

Installation Instructions

and Warranty Information

’65-’70 Ford Mustang 289/302 V8

P/N 6651S

Read all instructions carefully before attempting installation.

1.19.05

Installation instructions for JBA Tri-Y Headers P/N 6651S

For ’65-‘70 Ford Mustang with 289/302 V8

** Requires JBA power steering ram drop down bracket p/n 6656P for installation on vehicles
equipped with factory power assist steering.

**‘64

1/2 - ‘66 Mustangs must use motor mount p/n D0OZ-6038-G or Sealed Power # 270-2286 for

proper clearance.

NOTE: Installation of this product requires an adequate workspace, general mechanic's tools,
general mechanical "know-how" and a reasonable degree of experience.

Most auto enthusiasts
with these resources will have little difficulty installing these headers. However, you should
carefully read these instructions before attempting to install these headers. If in doubt, consult a
professional mechanic. (Better to do it now than to get stuck halfway through the installation.)
This part is certified for use on Emission Controlled Vehicles.

By installing your JBA Performance Exhaust product, you indicate that you have read this
document and agree with the following terms.

The Purchaser is responsible for following all installation instructions and safety guidelines
supplied with JBA Performance Exhaust products.

JBA Performance Exhaust assumes no responsibility for damages resulting from improper
operation, misuse, abuse, or lack of responsible care, or any problems resulting from
incompatibility with other manufacturer's products.

Included with your installation instructions is a copy of the product warranty. Please read it
carefully before you begin any work on your vehicle. Should you have any questions about the
warranty policy or installation, please give JBA a call at 619 229-7797.

JBA uses sealing beads on all its headers. We have found that when installed correctly the
raised bead around each port increases the pressure exerted on the gasket directly adjacent to
the port and effectively prevents leaking gaskets.

It is important when installing the header, to
install all bolts loosely, then tighten evenly to ensure the flat installation of the flange. It is normal
for the flange to be raised off the cylinder head the thickness of the sealing bead.

Note: Typically the exhaust pipes in these early Vehicles are long gone. These instructions

contemplate the removal of old components and the installation of a new exhaust system
by a competent exhaust shop. Thus if you are replacing conventional headers (which
typically exit under the belly near the transmission) with the JBA Tri-Ys, and your exhaust
pipes are in good shape, the modifications to be performed by an exhaust shop will be
relatively minor. These instructions cover only the installation of the JBA headers.

1. Place vehicle in a location where the floor is solid and flat, with adequate lighting. Do not

attempt

to work on a hot engine. Heat causes metal to expand and makes removal of
fasteners difficult at best. Disconnect the battery cables from the battery. Raise the front
of the vehicle to obtain adequate access to the bottom exhaust manifold flanges. Use
large-base jack stands to support the vehicle. Do not rely on the jack! Block the tires to
prevent the vehicle from rolling off the jack stands.

2. Disconnect the spark plug wires by grasping and gently twisting the spark plug wire

boots.

Do not pull on the wires! Brush or blow any debris which may have collected
around the manifolds or spark plugs. This will help prevent foreign matter from entering
the combustion chamber when the manifolds are removed. Spray WD-40 or some type
of penetrating oil on all accessible fasteners and fittings before attempting to remove
them.