The Plastigage Flexigauge kit allows you to precisely measure engine clearances ( connecting rods , crankshafts, shafts).
Easy to use, it requires no micrometric tools and gives a direct reading in mm or inches.
Original ACL Performance product, reliable and used in competition and precision mechanics.
Each kit contains 10 calibrated measuring strips (length ~30 cm).
Available in 4 colors corresponding to 4 tolerance ranges (green, red, blue, yellow).
💯 Compatible with all engines: car, motorcycle, marine, industrial.
Plastigage ACL Flexigauge Kit – Accurately measure your engine clearances
The Plastigage ACL Flexigauge kit allows you to easily and accurately measure the clearance between your engine bearings and crankshaft or camshaft , without complex tools. Developed by the ACL Performance brand, world-renowned in motor racing, this kit is a must-have for mechanics, tuners and car enthusiasts 🛠️.
🎯 Key Benefits
- ✅ Quick measurement without micrometric tools
- 📏 4 tolerance ranges available depending on the color (green, red, blue, yellow)
- 🔧 Easy installation – read directly from the envelope
- 🧪 Ideal for checking connecting rods , crankshafts, camshafts
- 🌍 Compatible with all engines: car, motorcycle, marine, industrial
🎨 Available measurement ranges
Color | Measuring range | ACL Reference | Recommended use |
---|---|---|---|
🟩 Green | 0.025 → 0.076 mm | AG-1 / RG-1 | Very fine games – competition engines |
🔴 Red | 0.050 → 0.150 mm | AR-1 / RR-1 | Standard – majority of engines |
🔵 Blue | 0.10 → 0.25 mm | AB-1 / RB-1 | Slightly worn engines |
🟡 Yellow | 0.20 → 0.40 mm | AY-1 / RY-1 | Important games – old engines |
📦 Kit contents
- ✅ 10 calibrated measuring strips (~30 cm)
- ✅ Printed reading scale (mm and inches)
- ✅ Color ACL box according to the range
- ✅ Original ACL Product – Made in Australia
📐 Technical characteristics
Brand | ACL Performance |
Number of bands | 10 per kit |
Length per strip | About 30 cm |
Graduation | mm and inch (on the envelope) |
Applications | Car, motorcycle, marine, competition, industrial |
Engine type | Gasoline, Diesel, 2T, 4T |
Use | Checking the bearing and bearing clearances |
🔧 Quick instructions
- Clean the surfaces to be measured (oil-free).
- Place a Flexigauge strip on the crankshaft journal or shaft.
- Close the bearing or bushing and tighten to the manufacturer's torque.
- Remove, then measure the crushed width of the strip.
- Compare with the printed scale for exact clearance.
❓ FAQ – Frequently Asked Questions
What is Plastigage or Flexigauge?
Plastigage is a calibrated tape used to measure internal clearances between two mechanical surfaces, such as engine bearing or bearings. A fast, economical and widely used method in engine preparation.
Can it be used on all engines?
Yes. It is suitable for petrol, diesel, 2-stroke, 4-stroke engines, old or modern, on all types of vehicles or machines.
What do the colors correspond to?
Each color indicates a measurable thickness range. Green (very thin), red (standard), blue (medium), yellow (large clearance). You should choose the appropriate color for your application.
Is the kit reusable?
No. Each strip is for single use only. Once crushed, it cannot be reused. Each kit contains 10 strips for 10 measurements.
Can we choose the color when ordering?
Yes ✅. This product is sold by color. Select the desired version (green, red, blue, or yellow) according to the desired tolerance.
Is this product original ACL ?
Yes. This is an official ACL Performance Australia product, recognized worldwide in motor racing.
What if I don't know the engine tolerance to be measured?
Refer to your engine manual or contact our customer service to guide you in choosing the right Flexigauge for your configuration.