I got them at PEP BOYS for about $90 bucks...
Install is really easy...

1. Take off the black stocks tubes.
2. Put blue rubber sleeve on the engine cover.
note: the sleeve is 2 inch on 1 side and 3 inch on the other.
3. Tighten clamps.
4. The tube slides into the blue sleeve.
5. Attach Filters.

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