The Katech 87mm CNC-Ported Throttle Body for LSA and LS9 applications is engineered to increase airflow efficiency, throttle response, and overall engine performance on supercharged GM platforms. Precision CNC porting and Katech’s race-validated airflow development ensure smooth, consistent airflow while maintaining OEM-level driveability and electronic throttle control functionality.
Designed specifically for LSA and LS9 supercharged engines, this throttle body is ideal for high-performance street, track, and motorsports applications where increased airflow demand exceeds factory throttle body capability.
87mm throttle bore for increased airflow capacity
Precision CNC-ported inlet and bore for improved airflow efficiency
Katech-branded throttle plate with laser-etched identification
Maintains OEM electronic throttle control (ETC) functionality
Improved throttle response under boost
Designed for high-horsepower supercharged applications
Direct replacement design for factory LSA / LS9 throttle bodies
Each Katech throttle body is CNC-ported in-house to optimize airflow transitions and reduce restriction at the throttle inlet and bore. Porting is designed to maintain smooth airflow characteristics while supporting increased mass airflow required by higher boost levels and upgraded supercharger systems.
Unlike generic porting services, Katech applies race-proven airflow strategies developed through decades of GM LS-based engine development. The result is improved throttle response, reduced pressure drop, and consistent airflow across the full throttle range.
GM LSA Supercharged Engines
GM LS9 Supercharged Engines
Common Applications Include:
Cadillac CTS-V (LSA)
2009–2015 CTS-V Sedan
2011–2014 CTS-V Coupe & Wagon
Camaro ZL1 (LSA)
2012–2015 Gen Camaro ZL1
Corvette ZR1 (LS9)
2009–2013 C6 Corvette ZR1
Verify specific vehicle compatibility and tuning requirements prior to installation.
Direct bolt-on replacement
Retains factory electronic throttle control motor and connector
ECU recalibration may be required for optimal performance depending on combination
Professional installation and calibration are recommended for best results.
Since 1977, Katech Engineering has delivered race-winning engine components trusted at the highest levels of professional motorsports. Every Katech throttle body is machined, inspected, and validated in-house to ensure repeatable performance, precision fitment, and uncompromising quality.
Part Number KAT-A7554 New GM 87mm throttle body. No core required. CNC ported Offers improved airflow and throttle response over stock throttle body Fits: 5th Gen Camaro ZL1 V2 CTS-V C6 Corvette ZR1
