Airaid PowerAid Throttle Body Spacer. The end result is more part-throttle torque and improved mid-range power. Fits 2002-2009 Chevy Trailblazer/ GMC Envoy 4.2L. Improves low end torque and throttle response.
didn't receive. mpg gain as advertised. install was pretty simple. unsure if hp increased. also installed cold air intake at same time. sounds a little different but gas mileage didn't increase.
Super easy install. Very competitive price. Wish it was anodized red like the picture showed but no one will ever see it unless I show them. Love the whistle noise it makes. Can instantly notice the difference.
Works well with the air intake from the same company. Gas mileage went up a bit and sounds cooler. Didn't buy for performance more for mileage. All Air Raid products are top quality.