No one has modded these cars more than I. I would not waste my money on something that didn't produce performance. I truck for a living. So I have owned big rigs, all Cummins engines. Air is important in the diesel world as well, but even more so in the S/C'd engines. Especially cooler air. A tune is necessary to bring it all together, but well worth the investment if you want more performance. On a naturally aspirated car, probably wouldn't waste my money. Just my take...