Want to lower intake air temperatures on your 911 Turbo without breaking the bank? Lower intake temperatures equate to more efficient combustion, and allow room to safely run more boost. Upgrading to these late 997 intercoolers requires modifying your intercooler ducts, but is otherwise a straightforward install. Tests have shown significantly lower intake temperatures with these intercoolers over the stock 996 Turbo and 997.1 Turbo intercoolers. Recommended for stock, or mildly modified cars running up to 620 horsepower. This kit includes left and right intercoolers, and new o-rings for all 4 intercooler hoses.