Lexus IS 250, IS 350 and RC 350 Cold Air Intake from AEM Adds Verified Horsepower
Both the 2.5L and 3.5L versions of the V6 motors fitted to the 2015 Lexus IS 250, IS350, and RC 350 are part of the Toyota GR family of engines. They all feature an open-deck, 60° die-cast aluminum block with aluminum DOHC, four valves per cylinder heads. This engine also features forged steel connecting rods, one-piece cast camshafts, and a cast aluminum lower intake manifold. The 2.5 L version of Toyota’s GR motor retains the same bore as the 3.5 L engine, but with a shorter stroke to achieve the smaller displacement.
With the deep breathing capabilities of the dual-overhead camshaft four-valve per cylinder head, what often limits power is the factory air intake system. Compromised for any number of reasons, the stock system doesn’t deliver the airflow to the engine that an AEM 22-688C cold air intake can.
The AEM cold air intake is a relatively inexpensive DIY modification that takes around an hour and a half to install with tools just about everyone has in their garage.
The results of AEM testing are that an otherwise stock 2.5L V6 Lexus IS-250 on the chassis dynamometer, the AEM 22-688C bolted to the test vehicle output power increased to 169 horsepower and 152 ft-lbs. of torque.
The AEM 22-688C air intake system ingeniously capitalizes on the large OEM intake filter housing so only lower-temperature outside air can reach the AEM replacement air filter provided. Cooler air is denser, carrying additional oxygen to which your engine adds more fuel, the requirement in increasing horsepower.
The filter itself is an OEM-sized (drop-in) non-woven synthetic filter media to help protect your engine from harmful road grit.
The air intake system comes complete with an AEM low restriction air filter, gunmetal grey powder-coated intake tubing. The AEM 22-688C air intake systems come with the necessary boots, clamps, and hardware for an OEM-type appearance. The kit also accommodates all factory emissions and vacuum lines. OEM mounting brackets and hardware are utilized for seamless installation.
Your AEM air filter is good for about 100,000 miles with proper service (depending upon your driving conditions). Cleaning consists of an application of AEM synthetic air filter cleaner which will loosen and dissolve grime and dirt built up on the filter, after which the filter can simply be rinsed with water, allowed to air dry and reinstalled. No oiling required.