Slip On Exhaust Instructions

Removal

!!! WARNING !!! Before working on your machine, make sure it is parked on a level surface with the transmission in park and/or the parking brake engaged. Do not work on any machine with a hot engine or exhaust.  Allow time for all parts to cool in order to reduce the risk of burns.

Blackout Exhausts: Take care not to get grease or oils on the exhaust.  Cleaning our Blackout exhaust with harsh solvents or abrasives will remove the coating and is not covered under warranty.

1. Loosen and remove the (4) flanged nuts securing the silencer to the headpipe. (See Figure #1)

2. Remove the single forward silencer mounting bolt and slide the mounting bracket off the silencer's mount.  

3. Carefully remove the remaining (4) rear silencer mounting bolts.  It is recommended to remove the lower mounting bolts first then remove the upper bolts while supporting the silencer so that it does not fall.  Save these (4) mounting bolts, they will be used during installation.  

4. Inspect the round gasket in the headpipe.  If worn or damaged replace with a new OEM gasket.  

Installation

1. Using (2) of the original silencer mounting bolts install the provided Upper Mounting Bracket as shown. Leave the bolts loose for adjustment.(See Figure #2)

2. With the remaining (2) original silencer mounting bolts install the provided Lower Mounting Bracket as shown.  Leave the bolts loose for adjustment.(See Figure #3)

3. Raise the HMF silencer into place behind both mounting brackets and loosely secure it using the provided (2) M8-1.25x40 Hex Bolts, (2) 1/4" Flat Washers, (4) 5/16" Fender Washers, and (2) M8-1.25 Nylock Nuts.  Place the 5/16" Fender Washers against either side of the pre-installed rubber bushings in the silencer.  Do not tighten at this point.  (See Figure #4)

4. Secure the silencer to the headpipe using the provided (4) M8-1.25x30 Hex Bolts, (8) 1/4" Flat Washers, and (4) M8-1.25 Stover Nuts.  Evently tighten all 4 bolts.  When tight there may still appear to be a gap between the silencer and headpipe.  This gap is due to the gasket in the headpipe.  (See Figure #5)

5. Inspect for proper clearance and alignment, adjust as necessary then proceed to tighten hardware in the following order:
i. (2) Silencer to bracket bolts
ii. (4) Bracket to chassis bolts(See Figure #6)

Final Notes:

If you received a stainless steel exhaust without the Blackout coating it is normal for the pipes to change color as they heat cycle.  

The HMF Blackout exhaust will smoke and put out an odor for the first full heat cycle as the coating goes through its final curing process.  It is recommended to allow this process to happen in a well ventilated area.

All systems will produce a smoke out the end cap after a short initial heat cycle, this is the packing material bedding in and is completely normal.