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AIRAID 300-577

AIRAID Throttle Body Spacer
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5
3.7 out of 5 stars 3 Customer Reviews
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List Price: $179.99
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$143.99 USD


The AIRAID 300-577 fits some Chrysler Aspen, Dodge Durango, Dodge Ram 1500, Dodge Ram 2500, and Dodge Ram 3500 models. See vehicle applications for details.
The POWERAID Throttle Body Spacer is designed to enhance off-idle torque from 800 rpm to approximately 3,000 rpm. The spacer utilizes it’s unique, patented Helix Bore design to spin the incoming air charge as it passes through the throttle body spacer. The spinning air action boosts the velocity of the incoming air and contributes to better atomization of the air/fuel mixture as the air charge enters the combustion chamber. The end result is more part-throttle torque and improved mid-range power.

[More Information on POWERAID Throttle Body Spacers]
  • Made from aircraft quality billet 6061-T6 aluminum
  • Improves low end torque and throttle response
  • Gaskets, hardware and precision brackets are included
  • Installs in less than 1 hour
  • No drilling or cutting required
  • Provides stronger mid-range power

Part 300-577 Product Specifications

Product StyleAIRAID PowerAid
CARB EO NumberD-609-3
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight0.5 lb (0.2 kg)
Product Box Height9.75 in (248 mm)
Product Box Length6 in (152 mm)
Product Box Width1.5 in (38 mm)
FinishAnodized Red
Gaskets IncludedYes
Material UsedBillet Aluminum
Mounting Hardware IncludedYes
Thickness1 in (25 mm)
Warranty12 Months - 24,000 Miles
WARNING: Cancer and reproductive

Product Reviews

October 19, 2017 - Part 300-577
I bought this looking to increase the gas mileage on my 2004 Ram 1500 5.7 Hemi. Easy install but, the o-ring was an unusually tight fit. Almost to the point of being too fat. And it would have been nice to see some torque specs for the mounting bolts. This is the reason for the 4 star rating. Yup, I could tell the difference right out of the driveway. Better throttle response. The first 150 mile trip was a winding two lane state hi-way with a tail wind and it got 5 mpg better then normal. Return trip against the wind was still 3 mpg better then normal. Now we'll see how it does during regular everyday driving. I don't hear a whistle.

Vancouver, Washington
February 28, 2017 - Part 300-577
The part is outstanding, as it does give you noticeable low end tourqe. Easy to install. One factor to it though, it has a loud whistle at about 15 throttle pressure, that can get pretty annoying. But if you can live through that. It's a great prouduct.

December 22, 2016 - Part 300-577
Bought your spacer for my 2003 Dodge Ram 3500 5.7 hemi. It has 177500 mile on it. I was not sure how well it would work but the install is very easy and from the moment I pulled out of the drive way, I could feel the difference in its low end torque. I'm very happy with it and will be installing one on our other truck asap.

Robert Edwards
Wellington, Colorado
   Review part 300-577