Hi. Sorry to hear you're having these problems with the Integra seat comfort. I actually switched from Civic SI to Integra to get the improved comfort, and so far am finding the Integra definitely better. That said, the Integra seats are definitely on the firm side compared to my wife's Kia SUV seats, but it's a sporty car so needs some firmness. For myself, I think the Integra strikes a pretty good balance. I have taken several day-long highway drives and found the Integra really good, especially with the Comfort mode option.
For me, on a long drive, adjusting the lumbar to give more push on the lower back makes a difference. So I'd suggest fiddling with the lumbar and adjusting it while driving and see if that helps. Good luck. Hope you can find better comfort in your Integra.
For me, on a long drive, adjusting the lumbar to give more push on the lower back makes a difference. So I'd suggest fiddling with the lumbar and adjusting it while driving and see if that helps. Good luck. Hope you can find better comfort in your Integra.