After the intercooler does it's job, then the pressurized air is on it's way to the engine for use. This is the MOST important component. There is nothing left but this pipe before this pressurized air is used - so you do not want to worsen this air in any way possible. The stock RA LICP, which is made of plastic, has a small diameter (which causes heat as particles collide) and an unusual bend (again, another place for collision and heat generation). The Evo X LICP is a finely crafted piece - made from aluminum to hold the air, a bigger diameter, and very smooth curves for a clean flow straight to the engine. Almost nothing interrupts the air as it is fed to the engine with this pipe - which is what you want.
This is the biggest misconception that RA owners seem to have. Most think that the UICP is the biggest restriction and that the LICP is fine. The expanding OEM UICP hose just lose you throttle response, but still accomplishes it's job of sending the air to the intercooler.
The OEM LICP, with so many bends, ruins work that the intercooler accomplished. With so much restriction in flow and bends causing collision and heat generation, you're ruining the work of the intercooler just before the air enters your engine for use.
But with how cheaply you can pickup a whole Evo X set (UICP + FMIC + LICP), I recommend you replace all pieces at the same time. This also avoids any fitment issues - just complete replacement with 100% fitment.
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