What size throttle body is on srt4?
The stock throttle body on the Dodge Neon SRT-4 is 60 millimeters in bore diameter. This is the baseline size used on the common 2003–2005 Neon SRT-4 models. Some enthusiasts upgrade to larger throttles for boosted builds, but 60mm remains the standard factory size.
Understanding the numbers
Throttle body size is measured by the bore diameter—the circular opening through which air passes when the throttle is fully open. A larger bore can reduce airflow restriction, but gains depend on the turbo size, intercooler capacity, intake design, and engine tuning. For the SRT-4, the 60mm throttle body was designed to complement the factory turbo and intake system for its performance level.
Year-by-year and model notes
Across the typical production span of the Neon SRT-4 (model years 2003 through 2005), the factory hardware used a 60mm throttle body. While part numbers and seals may differ by year or build date, there isn’t a widely recognized change to a different stock size within that generation. As with many performance cars, aftermarket swaps are common for boosted setups and tuned configurations.
Common aftermarket options and what to expect
For those pursuing higher airflow in boosted builds, aftermarket throttle bodies are a common route. The community often gravitates toward sizes in the 62mm range and larger variants, depending on the turbo configuration and tuning goals. The exact performance outcome depends on the entire intake/turbo/fueling system and the engine management strategy.
Performance considerations
Upgrading the throttle body can improve top-end flow, but it can also affect idle, part-throttle response, and air-fuel balance. Larger sizes usually require accompanying adjustments to the intercooler, intake piping, MAF calibration, and a proper engine tune to realize gains and maintain reliability.
- Stock size: 60 mm (factory Neon SRT-4, 2003–2005)
- Common aftermarket sizes: 62 mm and larger variants are used in some boosted builds
Before selecting a larger throttle body, consider your overall build, fuel system, turbo size, and ECU capabilities. A tune is typically essential to maximize benefits and avoid drivability issues.
Installation considerations and tips
Throttle body upgrades aren’t just bolt-ons. They often require ECU reprogramming or reflashing, recalibration of the MAF sensor, and adjustments to the intake tract and vacuum lines. To prevent lean conditions or idle instability, plan the upgrade with a competent tuner and, if possible, verify the entire air-management path from the turbo to the throttle.
Summary
The SRT-4 comes with a 60 mm throttle body as the stock size, with many boosted-build enthusiasts exploring slightly larger options (commonly in the 62 mm range) depending on their turbo, intake, and tuning. The real-world gains depend on the complete setup and how well the engine is tuned to match the airflow changes. For precise guidance tailored to your car’s year and configuration, consult official Mopar parts references and a qualified tuner.
