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Re: Great Results
buttnekked........... double check me but I'm pretty sure you can't use a throttle body spacer with the K&N FIPK. When installing the K&N kit I'm familiar with (#5730211), you must trim some of the fan shroud for clearance of the inlet tube.
If a throttle body spacer is used in conjuction with this kit, the blades of the stock cooling fan will hit the inlet tube. A way around this might be the use of an electric cooling fan.
K&N has a new kit I believe that uses a metal inlet tube (if one is available for the Silverado) and maybe this clearance situation has been addressed. Good luck!!
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