1. Home
  2. Engines
  3. Wildcat Engines
  4. WildCat 223 Engines
  5. Wildcat 223 Head & Valve Train
  6. WildCat 223 OEM Head & Components
  7. Wildcat 223 Stock Hemi Cylinder Head - Bare
Wildcat 223 Stock Hemi Cylinder Head - Bare
Wildcat 223 Stock Hemi Cylinder Head
Write a Review

Wildcat 223 Stock Hemi Cylinder Head - Bare

Part Number: 20023-00025-00
Online Price: $29.99
Phone Order Price:$34.99
You Save:$5.00(14%)
Wildcat 223 Hemi Head – Best Predator 212 Hemi Head Upgrade
Availability: In Stock.

Send to:

*We'll ask for shipping info at checkout

Description

Wildcat 223 Hemi Head – The Ultimate Stock Hemi Head Upgrade


Unlock superior performance with the Wildcat 223 Hemi Head – the best stock Hemi head on the market when compared to the Predator 212 Hemi and Ducar Hemi heads. Whether you're competing in stock appearing classes or building a torque-focused engine, the Wildcat Hemi Head delivers unmatched flow, tuning potential, and component compatibility.


Why Choose the Wildcat Hemi Head?

1. Superior Valve Angle & Port Design

The Wildcat features optimized valve angles that are wider than the Predator 212 Hemi, allowing the valves to unshroud more effectively. This creates a reshaped combustion bowl that enhances low-lift airflow, improving engine breathing and combustion efficiency. Unlike the Ducar Hemi, the Wildcat is compatible with Predator Hemi Rocker Arms, giving you more flexibility with aftermarket valve train options.


2. Enhanced Airspeed for Low-End Torque

The Wildcat 223 Hemi is engineered to maximize airspeed, making it ideal for engines using smaller carburetors or built for low-speed torque. This means better throttle response and more usable power across the RPM range.


3. Porting Potential

The intake port has a compact cross-section and volume, but the real advantage lies in the material on the short side radius. Among all stock Hemi heads, the Wildcat has the most material here, allowing skilled porters to shape an optimal radius and dramatically improve flow at low lift and low airspeed. The result? More torque across the entire powerband – especially when well-ported.


4. High-Flow Exhaust Design

Unlike traditional D-shaped ports, the Wildcat Hemi features a round exhaust port. This improves exhaust gas scavenging, boosting peak torque, and extending the powerband into higher RPMs. It’s a must-have for builders looking to get every last ounce of performance out of their engines.


5. Lightweight, High-Performance Valves

Equipped with 27mm intake and 25mm exhaust valves on 5mm stems, the Wildcat offers a performance advantage with reduced valve weight and enhanced airflow. It's the only stock Hemi head using 5mm valve stems, optimizing both flow and valvetrain efficiency.


Perfect for Stock Appearing Classes

If you're racing in a Stock Appearing Class with restrictions on valve size or cam profiles, the Wildcat 223 Hemi Head is your best option. Its stock legality, airflow potential, and component compatibility give you a winning edge.



Flow Bench Results (at 28”)

Wildcat Hemi Head

.050

.100

.150

.200

.250

.300

.350

.400

.450

Stock Non-Ported

12.69

29.23

41.58

43.94

44.20

44.18

44.17

44.15

44.1

Stock Hand-Ported

18.07

31.53

41.40

52.90

62.37

70.11

76.04

80.28

83.24

Increase

5.38
(42%)

2.3
(8%)

0

14.71
(20%)

18.17

(41%)

25.93

(38%)

31.87

(72%)

36.03

(81%)

39.14

88%)

FAQ

What makes the Wildcat 223 Hemi Head better than the Predator 212 or Ducar Hemi Heads?

The Wildcat 223 Hemi Head has optimized valve angles, a round exhaust port, and more material on the short side radius, which allows for better airflow and porting potential. It also supports Predator Hemi rocker arms, giving you more upgrade options.


Is the Wildcat Hemi Head legal in stock appearing classes?

Yes. The Wildcat 223 is highly recommended for stock appearing classes. It meets legal requirements while offering superior performance and porting options within class limits.


What size valves come with the Wildcat 223 Hemi Head?

It comes with 27mm intake and 25mm exhaust valves using 5mm valve stems—the only Hemi head in its class with this stem size, which improves flow and reduces weight.


Can I port the Wildcat Hemi Head for better performance?

Absolutely. The Wildcat has more material on the short side of the intake port than any other stock head, making it ideal for performance porting. With proper shaping, you can greatly improve torque and airflow.


What kind of exhaust port does it use?

The Wildcat 223 Hemi Head features a round exhaust port, unlike the D-shaped port in most stock heads. This shape improves exhaust flow and extends power into higher RPMs.


Does it fit my Predator 212 engine?

Yes, the Wildcat 223 is compatible with the Predator 212 Hemi and retains compatibility with Predator Hemi rocker arms. It’s a bolt-on performance upgrade with aftermarket flexibility. The Predator 212 Non-Hemi uses 12mm dowel pin which would require modifying the head to fit. 

Related Items

Wildcat 223 Exhaust Gasket
$0.99
In Stock.
Wildcat 223 Stock 5mm 27mm Intake Valve
$7.79
Out of Stock.

Recently Viewed Items