2005-06 Hummer H3 3.5L Dynomax Kit:19425 Installation Instructions
NOTE: Read all instructions before starting any work.
1. Remove the O.E. front pipe/muffler/tail pipe assembly from the vehicle. Lubricate the rubber isolators with WD-40, or a similar lubricant, to aid in removing the rod hangers. The O.E. system will not come off in one piece. Cut the system between the rear axle and the muffler. Both pieces will then come off easily.
2. Install DynoMax front intermediate pipe 54374. Insert the rod hanger into the rubber isolator on the RH frame. Finger tighten the nuts on the inlet flange connection to the converter pipe.
3. Install DynoMax over-axle pipe 54375. Insert the front and rear rod hangers into the appropriate rubber isolators on the R.H. frame and center cross-member. Use one of the 2ı⁄₂” band clamps provided to connected 54375 to 54374. Only finger tighten the clamp right now.
4. Install DynoMax Ultra Flo SS dual outlet muffler 17556. Insert the metal rod hanger into the rubber isolator on the L.H. frame. Use the other 2ı⁄₂” band clamp to connect the muffler to the outlet pipe 54375.
5. Beginning at the inlet end, align all components and tighten all the clamps.
6. Please see system diagram on back page of these instructions.
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