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How to Install X-Force Varex Long Tube Catted Headers w/ Cat-Back Exhaust System - 1-7/8 x 3 in. on

Installation Time

1 days

Tools Required
  • 1. Spanners and Sockets required
  • 2. 6mm, 10mm, 13mm, 14mm, 15mm, 17mm
  • 3. Extension bars and swivel join
  • 4. Jack to raise the engine
  • 5. Can of spray lubricant
  • ube of O2 Sensor safe sealant
American Muscle
Shop Parts in this Guide

Step 1

Disconnect Battery (located under a rubber lid in the engine bay on the left side near the windscreen)
Unbolt the right hand exhaust at the 2 bolt flange at cat (15mm) below the standard header and the flat band clamp (15mm) in the middle of the car. 
Unbolt the left side at the ball flare joint after the cat and the flat band clamp in the middle of the car (15mm)


Step 2

Right Header
From inside the engine bay, undo the 1 centre nut of the rubber engine mount.
Lift the car on the hoist, remove the steeling knuckle and push the upper steering shaft up.
Undo all 8 (15mm) nut on the factory header and remove the header.
Remove the front 4 studs, starter motor, jack up the engine (using a Hydraulic jack stand), remove the alloy engine mount arm.
Slide the Xforce Header in and start the nuts on the studs, refit the other 4 studs and start the nuts
Put the engine mount arm into the engine bay where it belongs (You will need to juggle the header on the studs) but don’t put bolts in.
Tighten header then refit the alloy engine mount arm and tighten, lower the engine down onto the rubber mount and tighten, refit the starter motor.
Refit the steering, O2 sensor and check that everything is tight and that you don’t have anything left over.
Time 3 Hours



Step 3

Left Header
Undo all 8 (15mm) nut on the factory header and remove the header.
Remove the front 4 studs and the top rear stud.
Slide the Xforce Header in and start the nuts on the studs, refit the other 4 studs and start the nuts
Tighten header then refit the O2 sensor (unclip the O2  plug from the mount so the harness becomes longer) and check that everything is tight and that you don’t have anything left over.

Time 1 Hour


Step 4

Fit the round ball flare gaskets to the header
Fit the cats and bolt up using the bolts with springs on them and do up FINGER TIGHT
Do not tighten until you have fitted the XForce cat back system.

Note: When you first start your vehicle after the installation of your new XFORCE Performance Exhaust System, there may be some smoke and fumes coming from the system. This is a protective oil based coating used in the manufacturing of mandrel bent performance exhaust tubing. This is not a problem and will disappear within a very short period of time after the exhaust has reached normal operating temperatures.


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