Rear Shock question

[Latemodel32]

I have a 06 trx 450R revalved shock by GTT and there MX link.I love it But i'm bottoming it out.The airbox is hitting the Dog bone and scuffing it up.The quad is set up at 7" frt and back with me on it so i believe the ride height is correct. Do i need to buy a airbox lifter? Is there any other co. out there that make them other then houser $60 ?Thanks for the input i've raced it 5x this summer and i have the red bud nat. coming up in a few weeks and wanna get this corrected

i think GTT says to lift your airbox up "Note: For full travel and the best suspension action – the airbox needs to be raised ½ inch – the exhaust must be spaced out to provide the correct clearance needed – and the left side of the subframe needs to be modified to provide additional clearance for the sprocket at full up travel."

thats for the 400ex though