Reviews for aFe Power 46-35008 Silver Bullet Throttle Body Spacer for 18-20 Jeep Wrangler JL & Gladiator JT

Installed on my 2020 Gladiator ,very easy to install , also have the AFE Quantom Pro cold air intake works very well together , ever so slight occasional whistle but not an issue , have seen a 1-1.5 mpg increase which i like and seems to have a little more pep when entering the frwy or accelerating through the mid RPMs . All in all very pleased ....

I don't notice any difference but I do notice a high pitched whining noise when i have the windows down and music turned off but not enough to deter me from buying it again. If the review above did not mention a sound I would not have noticed.

Before I added the K&N cold air intake had a small increase in throttle response and a barely noticeable whistle, after the K&N intake it sounds like a belt squealing. Good quality product just don’t like the sound after the intake so I removed it.

Added this to my jeep to get better gas mileage and a boost in torque. It seemed like it worked to some degree. Not sure I would buy it again for the minimal gains.

Has anyone else experienced an extremely loud whistle? I expected a small whistle but not what I'm experiencing.