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62 mm PERFECT Hi-Velocity Throttle Body For 1991-2004 4.0L Jeep  By Painless Performance

P/N 65300

62 mm PERFECT Hi-Velocity Throttle Body For 1991-2004 4.0L Jeep


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Year: 1991 - 2004
Make: Jeep
Engine: 4.0L
American Made


PERFECT Hi-Velocity Throttle Bodies are designed using state of the art CAD systems to provide the ultimate solution to EFI air flow control. 6061-T6 aluminum billet construction on full CNC machining systems create the largest bores possible in the factory mounting envelope without sacrificing strength or durability like a modified casting.

 These Throttle Bodies will fit all Jeep 4.0L engines model years 1991 through 2004 from any Jeep vehicle and are fully compatable with the stock ecm's as well. 2005 was a change over year and may have a two wire IAC. If so, then our throttle body will not work for those vehicles. Early 1991 model Jeep 4.0L engines used Throttle Body Injection. This will be obvious as you will have injectors and fuel lines running to the throttle body,  The PERFECT throttle body will not work on these models.

The PERFECT Hi-Velocity's patented permanent two piece construction provides the largest inlet for each throttle body while still maintaining a tapered approach to the throttle blade, flowing more air than a straight bore.  The 17-4 precipitation hardened stainless steel profiled throttle shaft used in these throttle bodies is tough enough to withstand all forms of on and off-road racing. Due to the strength of the stainless steel the shaft can be halved and profiled to present minimal resistance to flow at WOT, out flowing the competition's full round profile shaft. The PERFECT Hi-Velocity Throttle Body also uses only high strength sealed ball bearings with high temperature grease to assure a lifetime of operation under all conditions.  The dual wound stainless steel springs assure long service and excellent throttle control through the careful selection of spring rate for each application. The throttle blade is made from thin but tough .05" thick 5052 aluminum, elliptically profiled for quick response and clean shut-off.  The 0.100" thick laser cut steel linkage is designed to handle any driving condition and style and replicates all of the factory cable mounting positions. All PERFECT throttle bodies are designed with pressurization and nitrous use in mind, using materials and tolerances compatible with modern power-adders!

These throttle bodies come as complete kits, allowing fast installation without modifying the factory cables, controls or brackets. The anodized finish will provide a lifetime of "PERFECT" looks.


Stock Jeep TB: effective bore dia: 54mm, effective plate dia 59.8mm inlet dia: 62mm Effective flow rate: 415 CFM (being generous)

Stock height from mounting flange: 65mm


62mm PERFECT Hi-Velocity Throttle Body: Effective bore dia 62mm. effective plate dia: 62mm , inlet dia: 70mm. Effective flow rate: 600CFM

PERFECT Hi-Velocity Throttle Body height from mounting flange: 73mm

Intake manifold port size: 62mm


Connectors Included: Utilizes factory IAC and TPS sensors and connectors.

 62 mm PERFECT Hi-Velocity Throttle Body For 1991-2004 4.0L Jeep  By Painless Performance



ECM Flash Program



This is a basic start and run tune that we only recommend for a near stock application. We will only change the following parameters: delete VATS/PASS-KEY security, cooling fan on/off temperatures, rear end gear ratio, tire size, speed limiter, rpm limiter, idle rpm, and we will adjust the check engine light parameters. If your setup requires any other parameters tuned you will need to locate a local tuner. All ECMs are left unlocked to allow easy access for your tuner.

Step 1: Purchase one of the qualifying part numbers. See below for that list.

Step 2: If your part number is highlighted RED proceed to step 3B. If your part number is highlighted BLACK, proceed to step 3A.

Step 3A: If you have arrived at this step, your harness does not come with an ECM and you must provide one to be flashed. Please reference the manual with your harness to confirm the ECM part number required.

Step 4A: Once you have received your harness, please cut the Barcode label from the box as shown in the picture below.

Step 5A: Package and mail your ECM along with the Barcode label, a copy of your purchase receipt, and your ECM form that you are about to complete. (The address will be provided after you complete the form). We will pay for return ground shipping*. If you request a faster service, you will need to provide a return label.

Step 3B: If you have arrived at this step, your purchase comes with an ECM. You must fill out our ECM form BEFORE your purchase will ship. Proceed to Step 6.

Step 6: Click the “Start Here” button below to fill out our ECM questionnaire.

Step 7: Once we have the ECM, we will use the data from the form to flash the ECM. Then, once it has been flashed we will package the ECM and ship it back to you. If we encounter a question, we will contact you. This process can take 1-3 days.

Step 8: Once you receive your ECM, it is ready to go.


*Note: Our free return shipping is ONLY good for the lower 48 states, via ground UPS. If you are outside of those states, you must provide a return shipping label with your order. If your purchase comes with an ECM, the shipping will be covered via the retailer you purchased from.



Click the Start Here button below to get your FREE ECM Flash!

Click Here To Start The ECM Reflash Process


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