Kolpin 53550 - Stealth Exhaust 2.0 - Manual (Page 4)

Rev. 2
UNIVERSAL BOLT ON ADAPTER – 1 3/8” O.D.
Fits Honda 300. 350, 400, 450 and other makes/models with flat or concave outlet.
INSTALLATION INSTRUCTIONS:
This adapter is designed for use on most all ATV applications where the original equipment muffler outlet has a flat or
concave surface, and no male pipe outlet.
1. Hold the adapter centered over the exhaust outlet and mark the four mounting holes with scribe or marking
pen, and the center punch holes.
2. Drill the four holes with a 1/8” bit.
3. Using a 3/16” pin punch or awl, like that shown in the picture, hammer the punch into each hole to enlarge it
to the size that will accept the ¼” self tapping screws. This rolls some of the metal into the hole, and will
make the self-tapping screws grip better. Be very careful not to enlarge the holes past the maximum of
3/16”, so the self-tapping screw will tighten properly.
4. If your application has a concave surface on the muffler outlet, it is probably a good idea to use the supplied
gasket with some orange high temp silicone. Hold the gasket in place until dry. After the silicone has dried
enough to hold the gasket in place, apply the high-temp silicone liberally to both mounting surface’s and the
bolt holes. Now go to step 6.
5. If your application has a flat surface on the muffler outlet, you probably don’t need the gasket, just apply the
high-temp silicone liberally to both surfaces and the mounting holes.
6. Hold the adapter in place. Using a ratchet and socket start the self tapping screws by pushing on them and
turning them at the same time. You may have to tap the screw lightly with a hammer to get them started.
Tighten the screws securely, but use care not to over tighten to the point of stripping the threads.
7. This adapter has a 1 3/8” O.D. so the Stealth Exhaust 2.0 can now slide over it and be installed direct, using
the 1 3/8” muffler clamp in your kit.
8. IMPORTANT: If you are using the 80 degree adapter elbow pipe for the connection between the bolt on
adapter and the Stealth Exhaust 2.0, you must slide the #59 Split Bushing, from your Exhaust kit, onto the
bolt on adapter outlet before installing the elbow. This bushes the outlet up to the proper 1 ½” size needed
to install the elbow. ALWAYS USE HI-TEMP SILICONE ON ALL CONNECTIONS FOR MAXIMUM
NOISE REDUCTION.
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