KASTURBO ACA-1811 Column Linkage Billet TH350

( Brand: Kasturbo ), ( Manufacturer Part Number: ACA-1811 ), ( Bearing Type: Roller Bearing ), ( Unit Count: 1.0 Count ), ( Included Components: 1 X Billet Aluminum Bar 5 X Metal Spacers 2 X Black Plastic Washe ), ( Material Type: Alloy Steel, Aluminum ), ( Compatible Lubricant: Oil Or Grease )

Review KASTURBO Adjustable Column Shift Linkage Inch Billet Aluminum Compatible Th350

The **Kasturbo ACA-1811 Column Linkage** is a meticulously engineered, high-performance drive system designed exclusively for Ford s legendary **TH350 automatic transmission**, offering a seamless blend of durability, precision, and raw power for both street and strip applications. Built from **billet aluminum**, this linkage system is forged from premium-grade 6061-T6 aircraft-grade aluminum, ensuring an exceptionally lightweight yet incredibly rigid structure that minimizes flex and maximizes torque transfer. The **26-inch length** of the linkage is optimized for optimal engagement with the transmission s internal components, reducing slop and enhancing shift quality while delivering a more direct and responsive throttle-to-wheel connection. Unlike stock linkages, which are often prone to wear and binding, the ACA-1811 features **precision-machined bushings and a hardened steel pivot**, eliminating the need for constant lubrication and ensuring smooth, consistent operation over thousands of miles. This linkage is particularly well-suited for **high-horsepower applications**, where stock components would quickly fail under the stress of aggressive driving or heavy loads. Whether installed in a **muscle car, truck, or custom hot rod**, the Kasturbo ACA-1811 transforms the shift feel, reducing lag and providing a more linear, driver-focused experience. Built to withstand extreme conditions, this linkage is a must-have upgrade for enthusiasts seeking to unlock the full potential of their TH350-powered vehicle, blending cutting-edge engineering with the timeless reliability of Ford s iconic transmission.

### **Pros and Cons of Buying a Kasturbo ACA-1811 Column Linkage 26 Billet TH350**

#### **Pros**

1. **Performance Potential** The **ACA-1811** is a high-performance bolt-on kit designed for the **LS1/TH350** platform, offering significant power gains when paired with a supporting engine build. It improves valve spring pressure, reduces valve float, and enhances airflow, which can lead to noticeable performance improvements, especially in high-RPM applications.

2. **Billet Construction** The **26-inch rocker arms** are made from billet aluminum, which is stronger and more durable than cast components. This reduces the risk of failure under heavy loads and ensures better longevity, particularly in forced-induction applications.

3. **Compatibility with Stock and Modified Engines** The kit is designed to work with **stock TH350/LS1 engines** as well as **modified versions**, including those with **big valves, high-flow heads, or forced induction**. It is also compatible with **aftermarket camshafts**, making it a versatile upgrade.

4. **Improved Valve Train Durability** The **column linkage design** distributes load more evenly across the valve train, reducing stress on pushrods, rocker arms, and retainers. This can help prevent **valve float** and **valve spring failure**, especially at high RPMs.

5. **Easy Installation** Compared to some high-performance valve train upgrades, the **ACA-1811** is relatively straightforward to install, requiring minimal machining (only the rocker arm pads need to be machined flat). It does not require a full rebuild of the valve train.

6. **Cost-Effective Performance Upgrade** While not a cheap kit, it is **more affordable** than a full valve train overhaul (such as replacing pushrods, springs, and retainers). It provides a **direct performance boost** without requiring major engine modifications.

7. **Supports Forced Induction** If you plan to add a **supercharger or turbo**, the **ACA-1811** helps mitigate the increased stress on the valve train, making it a smart pre-turbo upgrade.

8. **Aftermarket Support & Tuning** Many **ECU tuners** (such as **Haltech, Link, or APEXI**) have maps optimized for this kit, allowing for **further power gains** when combined with a tune.

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#### **Cons**

1. **Not a Complete Valve Train Upgrade** While the **ACA-1811 improves valve spring pressure and rocker arm strength**, it does **not replace pushrods, retainers, or springs**. If your engine is running **stock valve springs or weak retainers**, you may still experience **valve float** at high RPMs. A **full valve train upgrade** (including **heavy-duty springs, retainers, and pushrods**) is recommended for maximum reliability.

- **Properly matched camshafts** (not too aggressive for your compression ratio)

- **High-flow cylinder heads** (if not already present)

- **A tuned ECU** (to prevent detonation and maximize power)

- **Sufficient fuel delivery** (upgraded injectors, fuel pump, or fuel system if running forced induction)

3. **Potential for Valve Train Binding** If the **valve train clearance is not properly adjusted**, the **longer rocker arms** could cause **binding or excessive lash**. This requires **precise setup** and may necessitate **adjustable rocker arms** or **proper lash caps**.

4. **Limited Stock Engine Reliability** A **stock TH350 with stock internals** may still struggle under heavy loads, even with the **ACA-1811**. Components like the **crankshaft, rods, and pistons** should be **stress-tested** before running high power.

5. **Installation Knowledge Required** While the installation is **not extremely difficult**, it does require **basic mechanical skill**. Improper installation (such as **misaligned rocker arms or incorrect lash**) can lead to **valve train issues**.

- **Heavy-duty valve springs & retainers**

- **Upgraded pushrods**

- **Tuned ECU**

- **Fuel system upgrades (if forced induction is added)**

- **Exhaust headers & intake for proper airflow**

These additional costs can **significantly increase the total investment**.

7. **Not a "Set-and-Forget" Solution** Unlike some bolt-on performance parts, the **ACA-1811 requires proper tuning and maintenance**. Running it without a **supporting engine build** can lead to **premature failure** of other components.

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### **Ending Conclusion**

The **Kasturbo ACA-1811 Column Linkage 26 Billet TH350** is a **solid performance upgrade** for those looking to **increase power and reliability** in their **LS1/TH350-based engine**. It is particularly beneficial for:

- **High-RPM applications** (where stock valve springs struggle)

- **Forced induction builds** (supercharged or turbocharged)

- **Engines running aggressive cams or big valves**

However, it is **not a standalone solution** it must be paired with **proper engine support** (cams, springs, tuning, fueling) to avoid **reliability issues**. If your engine is **stock or poorly supported**, the **ACA-1811 alone may not be enough**, and additional upgrades will be necessary.

### **Recommendation**

You are **already running or planning to run** a **high-performance camshaft** (or big valves).

You have a **tuned ECU** (or plan to get one) to prevent detonation.

You are **adding forced induction** (supercharger/turbo) and need **valve train reinforcement**.

Your engine has **upgraded valve springs, retainers, and pushrods** (or you plan to add them).

You want a **bolt-on performance upgrade** without a full valve train rebuild.

Your engine is **stock or poorly maintained** (risk of failure without support).

You are **not running aggressive cams or big valves** (may not see significant gains).

You **cannot afford additional valve train upgrades** (springs, retainers, pushrods).

You **lack mechanical knowledge** for proper installation and setup.

1. **Upgrade the valve train fully** (heavy-duty springs, retainers, pushrods).

2. **Install the ACA-1811** for improved valve spring pressure and rocker arm strength.

3. **Add a tuned ECU** (to optimize power delivery and prevent detonation).

4. **Consider forced induction** (if desired) with proper fueling upgrades.

5. **Ensure the rest of the engine is stress-tested** (crank, rods, pistons, etc.).

If done correctly, the **ACA-1811 can be a great addition** to a **high-performance LS1/TH350 build**, but it should not be treated as a **quick fix** for a weak or neglected engine.

Details:

Adjustable Column Shift Linkage 26 Billet Aluminum, Compatible with TH350 TH400 700R4 200-4R Transmission, Universal Truck Hot Rod Shiftier Kit:: Wide Compatibility TH350, TH4 700R4, and transmissions.

specifications radiocontrolother:

• brand: Kasturbo
• mpn: Aca-1811
• bearing type: Roller Bearing
• unit count: 1.0 Count
• included components: 1 X Billet Aluminum Bar 5 X Metal Spacers 2 X Black Plastic Washe
• material type: Alloy Steel, Aluminum
• compatible lubricant: Oil Or Grease

seller radiocontrolother:

• city: Miami, Florida
• # reviews: 514
• rating: 100.0%

payments radiocontrolother:

• wallet: Google-pay
• other
• credit card: Diners-club

returns radiocontrolother:

• policy: No Returns

general radiocontrolother:

• condition: New
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shipping radiocontrolother:

• cost: $0.00
• type: Fixed
• service: Expedited
• transit: 3-9 Days
• class: Expedited

offer radiocontrolother:

• availability: In Stock
• options: Ship-to-home
• started: May 12, 2026
• quantity: 1
• sold: 0