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Airaid PowerAid Throttle Body Spacer (91-06 4.0L Jeep Wrangler YJ & TJ)

Item J16395
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      Review & Installation Video

      I'm Ryan from, and this is my review and installation of the Airaid PowerAid throttle body spacer, fitting all 1991 to 2006 Wranglers with the 4L engine. Today, we're going to talk through the installation of this throttle body spacer, which is a very simple one out of three-wrench install. This is something anyone can do in their driveway in less than a half an hour. But we'll talk more about the installation in a second. We're also going to talk through the construction and a few of the features of this throttle body spacer. A throttle body spacer is designed to spin the air going into the engine to allow more air in, giving you even more power. Now, the power increase that you're going to see from a throttle body spacer if you were to put the Jeep on a Dyno would be at the very top of the power band, where you don't spend a lot of time, and those gains probably wouldn't be all that significant. Now, if you are looking to squeeze every little bit out of your engine, a throttle body spacer is one way to gain a little bit of extra ground. However, I wouldn't expect it to make your Jeep feel like you just did a V8 swap. This is going to be a very minor amount of additional power that you're going to get by adding this throttle body spacer. This throttle body spacer is red anodized billet aluminum, and it has Airaid's patented Helix Bore construction on the inside. That's really the threading on the inside of the throttle body spacer that is designed to spin that air and get more air into the engine. This comes with all of the hardware, the gaskets, and the instructions that you need to get it installed. Getting into the installation a little bit further, this is a very simple one out of three-wrench install that shouldn't take you more than half an hour. All you need to do is remove the four bolts that are holding the throttle body onto the top of your intake manifold. Go ahead and slide a throttle body spacer in place, and use the included hardware to bolt everything back together. If you choose to, this is a really good time to clean all of these sensors, and clean out the throttle body itself, while you have it removed. This throttle body spacer comes in at a little over $90, and if you've already added some power mods to your Jeep, if you're looking to squeeze every little bit of power out of it, then this is going to be an option that will do that. However, if you're somebody who has a Wrangler with oversized tires on it and you have that sluggish feeling, I wouldn't go with the throttle body spacer right off the bat. Go ahead and regear the Jeep. That's going to give you that powerful feeling back. It's going to be significantly more expensive than a throttle body. But it will absolutely work. This is for those of you that have already done exhaust, intake, coils, every little thing that you can do to squeeze the most power out of your engine, and just want that little bit extra. So if you've already added a bunch of power mods onto your Wrangler and you're looking to squeeze every last drop of power out of your engine, adding a throttle body spacer is a way to do that. So that's my review of the Airaid PowerAid throttle body spacer, fitting all 1991 to 2006 Wranglers that you can find right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Mid-Range Power
      • Enhances Fuel Efficiency
      • Increases Torque from 800 RPM to 3000 RPM
      • Unique "Helix Bore" Design
      • Red Anodized Billet Aluminum
      • CARB EO Number: D-609
      • Fits 1991-2006 Jeep Wrangler YJ, TJ Models with 4.0L Engines


      Stronger Throttle, Increased Torque. Improve your 4.0L YJ to TJ throttle response by installing an Airaid PowerAid Throttle Body Spacer. This red Throttle Body Spacer is designed to increase your torque from 800 rpm to 3,000 rpm, which will give your Jeep Wrangler a boost in mid-range power, while improving fuel efficiency.

      Cutting Edge Design. 
      The Airaid PowerAid Throttle Body Spacer features a unique "Helix Bore" design that is designed to maximize fuel efficiency, which will help save to you money at the gas pump. The Helix Bore creates a spinning action to the incoming air to provide superior atomization of the air fuel mixture for better combustion.

      Billet Aluminum Construction. Airaid constructed this Throttle Body Spacer from high quality aircraft grade billet 6061-T6 aluminum. The spacer is then completed in a red anodized finish for corrosion resistance. The spacer installs easily between your factory throttle body and intake manifold. All necessary hardware is included and no drilling is required for installation, just the use of simple hand tools.

      CARB Certified. Best of all this Airaid Throttle Body Spacer is 50-state smog legal under Carb EO# D-609.

      Application. The Airaid PowerAid Throttle Body Spacer is designed to fit the 1991-2006 Jeep Wrangler YJ, TJ models with 4.0L I-6 Gasoline engines and factory throttle body installed.

      Note: Coupon codes cannot be applied to this product.

      Fitment: 1991 1992 1993 1994 1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Details

      MPN# 310-510

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (44)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 44 customers

      Installation Time: Less than 1 Hour

      Installation Cost: 0-$100

      • November 03, 2019

        5 1992 Wrangler - VitoT Installation Time: Less than 1 Hour

        Throttle body spacer

        Fit perfectly on my 92 Jeep Wrangler 4 cylinder engine, it was easy to install. It definitely gave me a little more power which is what I was looking for,didn’t really notice better gas mileage. Very satisfied with this product.

        Helpful (1)
      • May 01, 2019

        5 1998 Wrangler - JKFitz Installation Time: Less than 1 Hour

        perfect fit.

        well worth the money, it was an easy install, perfect fit and a small performance gain in the top end.

        Helpful (3)
      • April 24, 2019

        4 2006 Rubicon - Josh Installation Time: Afternoon

        06 rubicon

        Made the hood look great and added plenty of ventilation. Loved the metal template. Made cutting a breeze and took away the worries of it sliding and messing up the cuts. The only thing is to be careful if a nut is tight it will make the affixed studs spin. Overall it is a great product.

        Helpful (2)
      • March 22, 2019

        5 1995 Wrangler - RileyG

        Very good for the price.

        This piece was super easy to install and a direct fit, haven't noticed any difference in horsepower, but I didn't expect to. Just a great peace of mind knowing my engine is getting optimal air intake

        Helpful (2)
      • March 12, 2019

        5 2005 Wrangler Unlimited - Woody11020 Installation Time: Afternoon

        Great add on

        This is a great and on peace that any backyard mechanic can do with his or hers tools

        Helpful (3)
      • December 23, 2018

        5 1999 Wrangler - DanM Installation Time: Less than 1 Hour


        Easy installation works great looks great, added power.

        Helpful (7)
      • November 19, 2018

        3 1995 Wrangler - AnthonyS

        Doesn't fit with certain aftermarket intakes.

        It's possible the part won't fit if you're running an aftermarket intake, When I went to install mine it caused my intake pipe to collide with the brake booster, and not fit. :/

        Helpful (9)
      • November 14, 2018

        5 2006 Rubicon - JeremyS Installation Time: Less than 1 Hour

        Throttle body spacer

        This is great product to go along with a intake system and exhaust.

        Helpful (9)
      • September 09, 2018

        5 2006 Wrangler Unlimited - MarkO Installation Time: Shop Install Installation Cost: 0-$100

        Airaid power

        I added the airaid spacer with the BBK 62 throttle body. I had already put on a KandN cold air intake. The combo is the best modification you can get legally in California. I can feel and hear the power and smoothness. Very happy.

        Helpful (11)
      • August 24, 2018

        5 1997 Wrangler - JonathonH Installation Time: Less than 1 Hour

        Exactly what I needed.

        Works as described and the performance pickup was immediately noticeable, fit perfectly.

        Helpful (10)

      Questions & Answers (9 answers)

      5 Top Rated Questions

      Please tell me exactly what this is designed to do and how it does it? Thanks

      • Hello, the Airaid PowerAid Throttle Body Spacer (91-06 Wrangler YJ & TJ w/ 4.0L) is a piece of metal used to change the airflow into the intake manifold. The spacer is bolted on the back of the throttle body, downstream of the main airflow. This is strictly an aftermarket enhancement used to increase the fuel economy, torque and horsepower. It basically directs the flow of air into the manifold to maximize the volume that goes into the intake.

      Helpful (2)

      Can this fit a 2.5 L

      • The Airaid PowerAid Throttle Body Spacer is designed specifically for the 4.0L, and would be incompatible with the 2.5L.

      Helpful (1)

      Does this throttle body spacer fit a 62MM throttle body?

      • No, the Airaid PowerAid Throttle Body Spacer is intended for the stock throttle body which is 55 mm.

      Helpful (0)

      What are the issues if you install this part in a CA vehicle (not pass smog, etc)? Customer Service named off a whole list of possible issues.

      • This item is CARB approved, meaning it is 100% legal to use in California and will not stop the vehicle from passing Smog/emissions testing.

      Helpful (0)

      This spacer said it is 50 states compliant. But the warning just before I was going to purchase this item, said not for California on hi-way. ??? Please let me know!

      • The Airaid PowerAid Throttle Body Spacer is CARB OE Certified meaning this is legal for use upon highway in the state of California and all other 49 States.

      Helpful (0)
      Post Your Question
      1 More Question
      I installed my throttle body spacer and it doesn't seem to whistle. i was wondering if it was normal and if not how to fix it. 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Throttle Body Spacer
      • (2) Gaskets
      • (3) Round Spacers
      • Hardware

      Will It Fit My Wrangler

      • TJ Rubicon 2 Door - 03, 04, 05, 06
      • TJ Rubicon Unlimited 2 Door - 05, 06
      • TJ Wrangler 2 Door - 97, 98, 99, 00, 01, 02, 03, 04, 05, 06
      • TJ Wrangler Unlimited 2 Door - 04, 05, 06
      • YJ Wrangler 2 Door - 91, 92, 93, 94, 95