I installed the HPS short ram about a year ago, along with the factory MAF. I also removed the entire factory intake system. I had no issues, other than a little lag in acceleration until the engine hit 2k RPM. I did install the JetChip MAF about 2 weeks ago, & I can definitely tell the difference. No more lag, especially with the A/C running! It was definitely worth the $125 for the chip!