Import Tuner likes taking parts and slapping them on cars in a segment called Power Pages, displaying what power benefits they offer. We found a nice article showing some great gains with the ATLP cat-back for the RDX.
Here is a link to the full article:
Among a Hondata Reflash and K&N Intake, gains were handily made with the addition of the ATLP Cat-Back.
Here is what they had to say:
Reducing exhaust backpressure is crucial to freeing up power in turbocharged cars. But, in vehicles like the RDX, so is maintaining a subtle appearance and sound. No one wants to outfit their $30K luxury crossover with a raspy “fart can”; that’s why the ATLP unit is an attractive addition. Mandrel-bent, 2.5-inch 439 stainless steel piping scavenges exhaust gas efficiently, resists corrosion and remains durable under high-heat duress, while proprietary heat resistant packing in straight-through silencers ensures years of quiet operation, and a polished 402 stainless muffler and dual four-inch tips give a more aggressive, yet mature finish.
Again, midrange and top-end power come at the cost of a few ponies down low, but with more than 10 whp and 11 lb-ft of torque throughout the powerband from below 4,500 rpm until redline, we consider this a non-issue.
I’m not sure I see where the power compromise is in their chart because it is such a small difference below 4000 rpm, but the midrange gains are undeniable: