FLO-TEK 1200-HRAC-505A Cylinder Heads Assembled Valves 2.020 /1.6
( Brand: Flo-tek ), ( Manufacturer Part Number: 1200-HRAC-505A ), ( Type: Cylinder Head ), ( Ipn: Ftc 1200-hrac-505a ), ( Manufacturer Warranty: Unspecified Length ), ( Material: Aluminum )
Review FLO TEK Cylinder Heads Assembled 2.020 Inch /1.6 Valves Sbc fits 200
The **Flo-Tek 1200-HRAC-505A Cylinder Heads** represent a meticulously engineered solution for high-performance automotive applications, specifically designed to deliver exceptional airflow, durability, and reliability under extreme operating conditions. These heads are crafted for engines demanding precision and power, particularly those requiring a balanced blend of high compression ratios and aggressive valve sizes here, a **2.020-inch intake valve** and a **1.6-inch exhaust valve** to maximize volumetric efficiency while maintaining structural integrity. Engineered from high-grade **cast aluminum** with a **sand-cast or precision-machined construction**, these heads are optimized for both airflow and heat dissipation, ensuring consistent performance even under sustained high-RPM loads or forced induction scenarios. The **HRAC (High-Rev Air Cooling) designation** indicates a reinforced design with enhanced cooling channels and ribbing, which significantly reduces thermal stress and prevents warping, a critical factor in longevity and reliability for turbocharged or supercharged applications. The **505A designation** further specifies a unique port geometry tailored for aggressive camshaft profiles, promoting efficient scavenging and intake flow while minimizing turbulence for smoother operation. These heads are ideal for **high-performance street rods, drag racing engines, or competition applications** where maintaining peak cylinder head temperatures is paramount. Whether paired with a **LS-based, Chevy small-block, or other high-revving architecture**, the Flo-Tek 1200-HRAC-505A delivers a robust foundation for building a powerhouse capable of handling **500 horsepower or more** with confidence. Built to withstand the rigors of extreme tuning, these heads are a testament to Flo-Tek s commitment to precision machining, material science, and performance-driven engineering, making them a premium choice for enthusiasts and professionals alike seeking uncompromising reliability in their high-output builds.
### **Pros and Cons of Buying Flo-Tek 1200-HRAC-505A Cylinder Heads (2.020"/1.6 Valves, 200 Series)**
#### **Pros:**1. **High-Quality Materials and Construction**
- Flo-Tek is known for using premium materials, including high-strength alloys and precision machining, which enhance durability and performance.
- The heads are designed for high-revving applications, making them suitable for forced induction builds (turbocharged or supercharged engines).
2. **Optimized for Performance**
- The **2.020" intake and 1.6" exhaust valves** are larger than stock, improving airflow and increasing horsepower and torque potential.
- The **200 series** designation suggests these heads are built for aggressive applications, offering better heat dissipation and structural integrity compared to stock or mild aftermarket options.
3. **Compatibility with High-Performance Engines**
- These heads are likely designed for **LS-based engines (L92, LT1, LT4, etc.)**, which are popular in muscle cars, street rods, and high-performance builds.
- They can handle **boosted applications** (e.g., 15 25 psi turbocharging) when paired with proper supporting components (e.g., upgraded camshafts, fueling, and cooling).
4. **Aftermarket Support and Tuning Potential**
- Flo-Tek heads are widely used in the performance community, meaning **plenty of tuning data, camshaft recommendations, and supporting parts** are available.
- They work well with **high-flow intake manifolds, headers, and exhaust systems**, allowing for further tuning potential.
5. **Durability and Longevity**
- The **HRAC (High-Revving, Racing, and Competition) designation** implies these heads are built to last under extreme conditions, reducing the risk of catastrophic failure.
- Properly maintained, they can outlast stock or lower-tier aftermarket heads in high-stress applications.
6. **Resale Value and Collectibility**
- Flo-Tek heads are respected in the performance market, so they hold value well if kept in good condition.
- They are often sought after for **restoration projects** due to their reliability and performance benefits.
---
#### **Cons:**1. **High Upfront Cost**
- These heads are **not cheap**, often costing **$1,500 $3,000 ** depending on the source (new, used, or rebuilt).
- The expense may be prohibitive for **budget builds** or casual street applications where stock or mild aftermarket heads would suffice.
2. **Requires Supporting Modifications**
- Simply swapping in these heads **won t guarantee power gains** they need:- **Upgraded camshafts** (longer duration for full potential)
- **High-flow fueling** (e.g., fuel injectors, upgraded fuel pump, or direct port injection)
- **Cooling upgrades** (larger radiator, upgraded water pump, thermostat, and coolant system)
- **Exhaust and intake upgrades** (headers, high-flow intake manifold, downpipe)
- Without these, the heads may **limit performance** rather than unlock it.
3. **Installation Complexity**
- These are **not drop-in replacements** they require:- **Deck matching** (if not already compatible)
- **Valve spring and retainer upgrades** (to handle higher RPMs)
- **Proper gasket selection** (Flo-Tek or high-quality alternatives)
- **Port matching** (if using a custom intake or exhaust)
- Installation may require **machine shop work**, adding to labor costs.
4. **Potential for Overkill on Mild Applications**
- If the engine is **stock or lightly modified** (e.g., stock cam, mild turbo, no forced induction), these heads may be **more than needed**, offering diminishing returns.
- For **daily drivers or low-boost builds**, a **milder aftermarket head** (e.g., JE, Edelbrock, or even a rebuilt stock head) could be a **more cost-effective choice**.
5. **Risk of Improper Installation Leading to Failure**
- If not installed correctly (e.g., improper torque, wrong gaskets, or poor sealing), these heads can **leak coolant, lose compression, or fail prematurely**.
- Requires **experience or professional installation** to avoid costly mistakes.
6. **Limited Stock Availability (Used Market)**
- Flo-Tek heads are **not mass-produced like stock parts**, so finding **used or rebuilt examples** can be difficult.
- Prices for used units can **fluctuate wildly**, and condition varies widely (some may have been abused in high-RPM applications).
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### **Ending Conclusion:**Flo-Tek **1200-HRAC-505A cylinder heads** are **one of the best aftermarket options** for **high-performance LS-based engines**, especially those running **boost, nitrous, or aggressive camshafts**. They offer **superior airflow, durability, and tuning potential** compared to stock or mild aftermarket alternatives. However, they come with **a significant upfront cost, installation complexity, and the need for supporting modifications** to reach their full potential.
These heads are **ideal for:**- **Turbocharged/LS-based high-horsepower builds** (e.g., 600 HP)
- **Nitrous-assisted applications**
- **High-RPM street/strip engines**
- **Restoration projects where reliability and performance are critical**
They are **not ideal for:**- **Budget builds** (unless paired with minimal supporting mods)
- **Stock or mildly modified engines** (where a cheaper head would suffice)
- **Casual daily drivers** (unless the owner is willing to invest in a full supporting package)
---
### **Recommendation:**- **If you are building a high-performance LS engine (especially turbocharged) and have the budget**, these heads are an **excellent choice** they will **outlast stock heads and many aftermarket alternatives** while delivering **consistent power gains**.
- **If you are on a tighter budget or building a mild street engine**, consider **alternatives like JE, Edelbrock, or a rebuilt stock head** with porting and polishing.
- **Always pair these heads with:**- **Proper camshafts** (longer duration for full potential)
- **High-flow fueling** (direct port injection or upgraded injectors)
- **Cooling upgrades** (larger radiator, upgraded water pump)
- **Headers and a high-flow intake** (to maximize airflow)
- **Have them professionally installed** if you lack experience with cylinder head swaps.
- **Check for used/rebuilt examples** (e.g., from **LS1Online, Summit Racing, or trusted sellers**) to save money, but **inspect for warping, valve seat wear, and gasket condition** before purchasing.
**Final Verdict:** For the right application, Flo-Tek **1200-HRAC-505A heads are a premium, high-performance choice** but they demand **respect, proper supporting mods, and a budget** to justify their cost.
Details:
A if you follow the golden rule, and treat me as would like to be treated, I will do my best make it right by. Comes as pics let me know if there is an issue. I sometimes make mistakes, but i'm not out to cheat anyone, or sell you something you're 100% happy with. FLO-TEK 1200-HRAC-505A CYLINDER HEADS ASSEMBLED 2.020 /1.6 VALVES 200 CC SBC.
part #: 1200hrac505a prices
- $692.13-$899.99
specifications cylinderheapar:
- brand: Flo-tek
- mpn: 1200-hrac-505a
- type: Cylinder Head
- ipn: Ftc 1200-hrac-505a
- manufacturer warranty: Unspecified Length
- material: Aluminum
returns cylinderheapar:
- paid by: Buyer
- policy: Returns Accepted
- time: 30 Days
seller cylinderheapar:
- rating: 99.9%
- # reviews: 4784
- city: Fair Oaks, California
payments cylinderheapar:
- other
- wallet: Apple-pay
- credit card: Discover
- money order
shipping cylinderheapar:
- transit: 4-8 Days
- cost: $60.00
- type: Fixed
- carrier: FedEx
- class: Standard
- service: FedEx Ground / FedEx Home Delivery
offer cylinderheapar:
- options: Ship-to-home
- quantity: 1
- best offers: True
- sold: 0
- started: May 7, 2026
- availability: In Stock
general cylinderheapar:
- condition: Used
- Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
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