Katech 112mm Billet Throttle Body (KAT-A7311 / KAT-A7311-BLK)
If you’re serious about airflow, power, and maximizing the efficiency of your supercharged LT platform, the Katech 112mm throttle body is a proven upgrades for removing intake restriction for larger 2650 and 3.0L aftermarket blowers.
Machined from billet aluminum and designed around OEM GM electronics, this is not just a larger throttle body, it’s a precision airflow component engineered to eliminate restriction at higher power levels.
Available in: Clear Anodized “raw performance look” or Black Anodized “stealth, OEM+ aesthetic”.
Why This Matters.
For builds over 900rwhp, the 103mm throttle body starts to become a restriction, not just in peak airflow, but in how efficiently the blower can do its job.
The Katech 112mm TB addresses BOTH of those.
This results in:
Increased peak horsepower
Lower blower effort for the same airflow
Improved overall system efficiency
Key Features
112mm throttle blade for maximum airflow
CNC-machined billet aluminum construction
5-axis CNC inlet profile for smooth airflow transition
Retains OEM GM electronics and drivability
Compatible with high-performance supercharger inlets
Available in clear or black anodized finish
Katech 103mm vs 112mm Throttle Body
Let’s not sugarcoat this, a 103mm throttle body works… until it doesn’t.
What the 112mm Fixes:
+18% increase in cross-sectional area (this is huge)
Reduces inlet restriction
Improves airflow efficiency
Supports higher boost and airflow demand
Future-proofs your build
Bottom Line: If you’re running a Magnuson 2650 or Whipple 3.0L, you’re likely leaving power on the table with a 103mm.
Magnuson 2650 Compatibility (KAT-7337 Snout Required)
The best looking, most elegant method to upgrading the throttle body on your 2650.
Whipple 3.0L Compatibility (KAT-7760 Adapter Required)
The simple solution needed in order to utilize the 112mm TB on your Gen.5 Whipple 3.0L
When Should You Upgrade?
This is not a “just because” mod. You should strongly consider a 112mm TB if:
You’re over ~950 RWHP
Running a Magnuson 2650 or Whipple 3.0
Upgrading camshaft / heads
Seeing airflow or MAF limits
Chasing every last bit of power and efficiency
If your goal is:
This is the right move…
Katech 112mm Billet Throttle Body (KAT-A7311 / KAT-A7311-BLK)
If you’re serious about airflow, power, and maximizing the efficiency of your supercharged LT platform, the Katech 112mm throttle body is a proven upgrades for removing intake restriction for larger 2650 and 3.0L aftermarket blowers.
Machined from billet aluminum and designed around OEM GM electronics, this is not just a larger throttle body, it’s a precision airflow component engineered to eliminate restriction at higher power levels.
Available in: Clear Anodized “raw performance look” or Black Anodized “stealth, OEM+ aesthetic”.
Why This Matters.
For builds over 900rwhp, the 103mm throttle body starts to become a restriction, not just in peak airflow, but in how efficiently the blower can do its job.
The Katech 112mm TB addresses BOTH of those.
This results in:
Increased peak horsepower
Lower blower effort for the same airflow
Improved overall system efficiency
Key Features
112mm throttle blade for maximum airflow
CNC-machined billet aluminum construction
5-axis CNC inlet profile for smooth airflow transition
Retains OEM GM electronics and drivability
Compatible with high-performance supercharger inlets
Available in clear or black anodized finish
Katech 103mm vs 112mm Throttle Body
Let’s not sugarcoat this, a 103mm throttle body works… until it doesn’t.
What the 112mm Fixes:
+18% increase in cross-sectional area (this is huge)
Reduces inlet restriction
Improves airflow efficiency
Supports higher boost and airflow demand
Future-proofs your build
Bottom Line: If you’re running a Magnuson 2650 or Whipple 3.0L, you’re likely leaving power on the table with a 103mm.
Magnuson 2650 Compatibility (KAT-7337 Snout Required)
The best looking, most elegant method to upgrading the throttle body on your 2650.
Whipple 3.0L Compatibility (KAT-7760 Adapter Required)
The simple solution needed in order to utilize the 112mm TB on your Gen.5 Whipple 3.0L
When Should You Upgrade?
This is not a “just because” mod. You should strongly consider a 112mm TB if:
You’re over ~950 RWHP
Running a Magnuson 2650 or Whipple 3.0
Upgrading camshaft / heads
Seeing airflow or MAF limits
Chasing every last bit of power and efficiency
If your goal is:
This is the right move…
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