As everyone knows, an engines goal is to get as much air in & out as fast as possible, in order to make power. The more air in can flow with one revolution, the power you will make.
Which is why the 103mm throttle body has been the gold standard for stock and ported 1.7L blowers focused on making more power, by way of reducing restrictions within the air inlet track.
The Katech 103mm throttle body is the ultimate upgrade for performance enthusiasts who demand exceptional form and function. Crafted from high-grade billet aluminum, this throttle body is designed to push your engine to new heights, delivering an explosive increase in throttle response and a serious horsepower boost when paired with other mods like a Rotofab Big Gulp or Kong X-ported blower.
At a massive 103mm in diameter, this throttle body dwarfs the stock throttle body found in LT engines, unlocking a flood of airflow for unmatched performance. The precision-machined design ensures air flows smoothly and efficiently, reducing turbulence and maximizing every drop of power your engine can produce. Constructed with GM electronics and honed on a state-of-the-art 5-axis CNC machine, this throttle body is engineered to perform at the highest level.
If you desire the black anodized finish, there is an option below to upgrade.
Fitment; C7 Corvette LT1 and Gen 6 Camaro LT1 with MSD or other intakes with a minimum opening of 103mm. C7 Corvette LT4, V3 CTS-V LT4 and Gen 6 Camaro LT4 with ported supercharger snout. C7 Corvette ZR1 LT5 with adapter. The LT5 bolt pattern is different than this throttle body.
WILL NOT WORK WITH STOCK LT1 INTAKE OR STOCK UNPORTED LT4 SUPERCHARGER DOES NOT FIT 2024+ TRUCK/SUV.REQUIRES ENGINE CALIBRATION
Clear Anodized is Katech part number KAT-A6885
Black Anodized is Katech part number KAT-A6885-BLK
OPTIONAL BILLET INLET PRESSURE SENSOR
As you may or may not know, when you upgrade to a 103mm throttle body, you then create a binding conflict with the inlet pressure sensor hitting the back of the throttle body. This $35 solution allows you to rotate the sensor approx. 10 degree’s which allows for a secure installation and proper sensor function.
Although we do keep some inventory this part may ship direct from the manufacture depending on the time of your purchase.
AS SEEN on our 2026 LT4 Camshaft Shootout
We used this Katech 103mm TB along with the RGX HPFP and XDI 50’s, Flag Motorsports MACH V Heads, KONG X-PORT’d blower, and Slick Rick Stage.3 Camshaft, to make over 1,000hp on a 105F Dyno Day! You can read more about that HERE as well as watch the results video HERE, or behind the scenes playlist HERE.
As everyone knows, an engines goal is to get as much air in & out as fast as possible, in order to make power. The more air in can flow with one revolution, the power you will make.
Which is why the 103mm throttle body has been the gold standard for stock and ported 1.7L blowers focused on making more power, by way of reducing restrictions within the air inlet track.
The Katech 103mm throttle body is the ultimate upgrade for performance enthusiasts who demand exceptional form and function. Crafted from high-grade billet aluminum, this throttle body is designed to push your engine to new heights, delivering an explosive increase in throttle response and a serious horsepower boost when paired with other mods like a Rotofab Big Gulp or Kong X-ported blower.
At a massive 103mm in diameter, this throttle body dwarfs the stock throttle body found in LT engines, unlocking a flood of airflow for unmatched performance. The precision-machined design ensures air flows smoothly and efficiently, reducing turbulence and maximizing every drop of power your engine can produce. Constructed with GM electronics and honed on a state-of-the-art 5-axis CNC machine, this throttle body is engineered to perform at the highest level.
If you desire the black anodized finish, there is an option below to upgrade.
Fitment; C7 Corvette LT1 and Gen 6 Camaro LT1 with MSD or other intakes with a minimum opening of 103mm. C7 Corvette LT4, V3 CTS-V LT4 and Gen 6 Camaro LT4 with ported supercharger snout. C7 Corvette ZR1 LT5 with adapter. The LT5 bolt pattern is different than this throttle body.
WILL NOT WORK WITH STOCK LT1 INTAKE OR STOCK UNPORTED LT4 SUPERCHARGER DOES NOT FIT 2024+ TRUCK/SUV.REQUIRES ENGINE CALIBRATION
Clear Anodized is Katech part number KAT-A6885
Black Anodized is Katech part number KAT-A6885-BLK
OPTIONAL BILLET INLET PRESSURE SENSOR
As you may or may not know, when you upgrade to a 103mm throttle body, you then create a binding conflict with the inlet pressure sensor hitting the back of the throttle body. This $35 solution allows you to rotate the sensor approx. 10 degree’s which allows for a secure installation and proper sensor function.
Although we do keep some inventory this part may ship direct from the manufacture depending on the time of your purchase.
AS SEEN on our 2026 LT4 Camshaft Shootout
We used this Katech 103mm TB along with the RGX HPFP and XDI 50’s, Flag Motorsports MACH V Heads, KONG X-PORT’d blower, and Slick Rick Stage.3 Camshaft, to make over 1,000hp on a 105F Dyno Day! You can read more about that HERE as well as watch the results video HERE, or behind the scenes playlist HERE.
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