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C&L Throttle Body Upper Intake Plenum (02-04 GT)

Item 98420
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      Review & Installation Video

      Hey everyone, Justin with and this is my quick look into the C&L upper intake plenum fitting the two valve, 4.6 liter motor found in all '96 to '04 Mustang GTs. C&L devotes a majority of their time and efforts into designing and developing Mustang specific intakes using flow bench engineering and have been doing so for over 20 years now. Whether it's a cold air intake for your Coyote Mustang, a matte housing for your Foxbody or Cobra, or an upper intake plenum here for your SN95, chances are C&L has you covered.Now if you guys do want to see more from C&L, including other project car builds and other great Mustang content, you should definitely check out our YouTube channel sometime, click the link below to subscribe if you haven't done so already, and while you're there, take a look around and drop us some feedback.So the goal of the C&L upper intake plenum here is to maximize the airflow into your two valve motor, increasing not only your horsepower and torque, but also your throttle response. Now in fact, don't take my word for it, we have a ton of customer reviews on this product in particular, and I definitely encourage you to click the link below to head back to the product page, if you're not there already, to read up on some of these reviews.The plenum is made right here in the USA using high quality aluminum for the construction. Now, it is a carb certified 50 state legal part, so my SN95's in California can take advantage of this part. Now, if you guys do read those customer reviews like I just told you to, you will notice a majority of our customers actually pair this plenum up with a 70 or 75 millimeter after market throttle body. Now granted, you guys can take advantage of this part using your factory throttle body. But if you do want to maximize your gains with the larger volume and larger diameter, I highly recommend you go with an after market throttle body of your choice, especially on heavily modded two valves, which you'll really see some solid benefits thanks to the C&L.Getting the new C&L plenum installed isn't necessarily the hardest install in the world, but you will need to take care of a few different steps, including transferring over your EGR and intake air control valves over to the new unit. Because of this, we are going to call this install roughly two hours from start to finish using basic hand tools, but if it takes you guys a little longer, don't get discouraged. Keep in mind, we always have very detailed product breakdowns and installation breakdowns and installation breakdowns available on the product page. So if you do get a little jammed up, you can always reference those, or you can always reach out to one of our Mustang experts by phone or by email.So if you're looking to further open up the intake on your modified or stocked two valve SN95, then be sure to check out the C&L upper intake plenum, available here at

      Product Information

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


      • Maximize Airflow for More Horsepower
      • Perfect for Larger Throttle Bodies
      • Flow Bench Engineered and Tested
      • Durable Cast Aluminum Construction
      • Easy Installation
      • No Tune Required
      • CARB EO Number: D-640-1
      • Fits 2002-2004 GT Mustangs
      • Made in the USA


      Maximum Airflow. The C&L Upper Intake Plenum is specifically designed to improve the airflow into your 2002-2004 GT's 4.6L two valve V8 engine to maximize airflow for a noticeable increase in horsepower, torque and performance.

      Perfect For Larger Throttle Bodies. To really take advantage of a larger than stock throttle body you need a larger than stock intake plenum. Just by installing a C&L intake plenum in combination with a 75mm throttle body on a mildly modified Mustang you can see at least 8 more rear wheel horsepower, and as much as 15 more horsepower on a more heavily modified Pony.

      Made in the USA. Proudly made in the USA from the highest quality materials available, this C&L Performance Intake Plenum has been extensively flow bench tested and engineered to out perform the competition.

      CARB Certified. Best of all this C&L Upper Intake Plenum is 50-state smog legal under Carb EO# D-640-1 for 2002 through 2004 GT models.

      Application. This C&L Upper Intake Plenum is a direct bolt-in replacement for all 2002 to 2004 4.6L 2V Mustangs using a Stock, 70mm, or 75mm Throttle Body and will clear stock hoods with only a 1/2" height difference compared to stock.


      Fitment: 2002 2003 2004 Details

      MPN# 98420

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (32)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 32 customers

      Installation Time: Less than 1 Hour

      Installation Cost: 0-$100

      • March 02, 2020

        5 2003 GT - Truebluesteve Installation Time: Less than 1 Hour

        C L Plenum

        Great product casting was on point and noticable pull difference throughout rpm range

        Helpful (0)
      • July 19, 2018

        5 2004 GT - CharlesS Installation Time: Less than 1 Hour

        C L Plenum

        Was a great addition to my gt. I could feel the difference.

        Helpful (5)
      • May 07, 2018

        5 2002 GT - EricM Installation Time: Less than 1 Hour


        Looked for one of the best ones out there and leaned on this one, fits perfect, I went with 75mm throttle body also

        Helpful (5)
      • March 14, 2018

        5 2002 GT - MichaelM Installation Time: Less than 1 Hour


        Love it bolts right on i highly recommed this part

        Helpful (4)
      • December 16, 2017

        3 2004 GT - KennethDonahue Installation Time: Less than 1 Hour

        04 mustang GT.

        Great product. But the throttle cable bracket is sitting to low an catching on back hose. Needs to be higher. Got this to pass smog.

        Helpful (4)
      • October 22, 2017

        5 2002 GT - mob79 Installation Time: Less than 1 Hour

        great product

        very easy to install, the only thing is my gas mileage suffered greatly, i was told ill need to get a tune soon, i just have to do my exhaust and then ill get a tune

        Helpful (4)
      • October 04, 2017

        5 2003 GT - TheodoreC Installation Time: Shop Install Installation Cost: 0-$100


        Love it, goes great with the rest of my add ons. Looking forward to getting it tuned

        Helpful (4)
      • June 29, 2017

        5 2004 GT - ThatWhiteGT Installation Time: Less than 1 Hour

        Completely worth it

        Amazing product and I'm glad I went with it. Woke up my 04 GT for sure. Low end torque isn't what it was, but it's hardly noticeable, but the top end.. that's where this shines. Feels like you're hitting boost at 4Krpm and she keeps on pulling to redline

        Helpful (6)
      • June 25, 2017

        5 2002 GT - Carlosb08 Installation Time: Less than 1 Hour

        More Responsive and More Feel

        One of my favorite purchases I have made from American muscle! The sluggish feel is no more when you invest in the CandL Plenum, you can really feel the car move in the high ranges of the rpm. also bought it because I live CA and not to many companies make CARB certified plenums that are legal in CA.

        Helpful (5)
      • February 25, 2017

        5 2003 GT - LyndaP Installation Time: Less than 1 Hour

        More air

        The plenum along with a 75 mm. throttle body gave the car better throttle response. I was pleasantly suprised the car idles better than stock.

        Helpful (8)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      What's the difference between the 02-04 to the 96-01?

      • Between 2001 and 2002, the vacuum lines that went to the plenum changed. The two different C&L Upper Intake Plenums are essentially the same item, they just have different vacuum configurations for the two different years.

      Helpful (2)

      How large in millimeters is the inner diameter of this plenum? Thanks.

      Hi I own a 2000 mustang gt and I was wondering if this plenum can work on my car, it mentioned that "will not fit 2000 mustang gt".

      • This will not fit due to the vacuum lines that went to the plenum changed from 94-01 to 02-04.

      Helpful (0)

      How necessary is a tuner if I have this, a CAA, and a 75mm throttle boddy to go along with it? Will I being throwing a code? or can i bolt it on with minimal issues and tune it later?

      • This does not require a tune so you do not need a tuner.

      Helpful (0)

      Hi I currently have an 03 GT and I was wondering how I can get the 96 to 01 plenum to work on my 03? I had it on my 00 GT till someone totaled it.

      • The C&L Upper Intake Plenum will work on your 2003 GT. As far as swapping plenums, we suggest doing some further research online.

      Helpful (0)
      Post Your Question
      2 More Questions
      i was reading on the american muscle "when should you upgrade your throttle body" that with mild bolt ons like a CAI and exhaust its not good to exceed a 70mm throttle body size but i hear a lot of people saying in the comments that they paired this upper plenum with a 75mm throttle body, i bought a 70mm, is a 70mm good with this plenum with mild bolt ons or could it have handled a 75mm throttle body with mild bolt ons (CAI and exhaust) with no issues? did i make the right decision using a 70mm throttle body? will it create back pressure at the interface and if it does is that back pressure a good thing if eddy swirls and turbulence are created? 1 answer
      Work with Vic Jr? Would the C&L plenum work with the Victor Jr intake and if so, would it be better than the Edlebrock plenum that is suggested with the intake? By sight alone , I see it doesn't match, so is there an adapter to make it work or is it just not possible? 3 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Intake Plenum
      • (1) Small rubber hose

      Tech Specs

      Will It Fit My Mustang

      • GT - 02, 03, 04

      Does not fit 2001 Bullitt

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