Connecting Rod

Kit includes:
1 x Plastigauge PL-A box
1 x Plastiguage Mineral grease
1 x Plastiguage Silicone grease
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
3G Minerak Grease: To coat journal prior to use of Plastigauge
3G Silicone Grease: To apply to surface of shell
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PLASKIT
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100 Plasigauge strips per box
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
For measurements of: 0.001″ to 0.007″ (0.025mm – 0.175mm)
Suitable for use at temperatures between 0°C and 35°C
Contents:
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PLA007
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EACH 4 required.

Fits:
Porsche 912
Porsche 356
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61610301203
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
SET OF 4
Fits:
Porsche 912
Porsche 356
CP-Carrillo connecting rods are fully machined from a proprietary 4330m alloy forging for strength and durability. Rods are available with Pro-H 1/4 upgraded bolt with a UTS of 285ksi. The CARR upgraded bolt is a good choice if planning on revving the engine higher than 8500rpm.
All our bolts are manufactured with asymmetrical threads, each thread has a slightly different design than the previous giving the bolts an evenly distributed thread engagement. This helps increasing the clamp load and fatigue life of the fasteners
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61610301203CARR
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
SET OF 6
Fits:
Porsche 911 2.0L
Porsche 911 2.2L
CP-Carrillo connecting rods are fully machined from a proprietary 4330m alloy forging for strength and durability. Rods are available with 2 types of bolts: The standard WMC-H6 bolt with a UTS of 220ksi and our upgraded CARR-S6 bolt with a UTS of 285ksi. The CARR upgraded bolt is a good choice if planning on revving the engine higher than 8500rpm.
All our bolts are manufactured with asymmetrical threads, each thread has a slightly different design than the previous giving the bolts an evenly distributed thread engagement. This helps increasing the clamp load and fatigue life of the fasteners.
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Related, superseded, cross reference or alternative numbers for comparison.
91110301321
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
SET OF 6

These are 4340 forged Chromoly steel with high strength 3/8 Rod Bolts.
Bolt is 3/8'' and its torque is 75N.M.
Length: 5.120 inch / 130.00mm
Style: PRO-H
Bolt: 3/8
Materials: Forged 4340
Pin Width: 1.000 inch / 25.40mm
Big Width 0.854 inch / 21.69mm
Big Bore: 2.4019 inch / 61.008mm
Pin Bore: 22mm
Total/Rotate/Recip (gr)* 568 / 399 / 169
Fits:
Porsche 911 2.0L
Porsche 911 2.2L
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91110301321
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)


Fits:
Porsche 356 1950-65
Porsche 912 1965-69
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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61610301203014
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65


Fits:
Porsche 356 1950-65
Porsche 912 1965-69
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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61610301203017
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65

EACH 4 required.

Fits:
Porsche 356 1950-65
Porsche 912 1965-69
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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61610301203020
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
12 per engine. Price is each.

Fits:
Porsche 911 1965-69
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram Ref No 20.
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90110317200
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 914 (1970-1976)

Fits:
Porsche 911S (1969)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 20.
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90110317200
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)

6 per engine. Price is for each.
Fits:
Porsche 911/912 1965-69
Porsche 911 1970-83
Porsche 911 (930) Turbo 1975-77
Porsche 914-6 1970-76
Porsche 959 1987-88
Diagram Ref No 19.
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90110313102
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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
6 needed per engine.
Price is for each
Fits:
Porsche 911/912 1965-69
Porsche 911 1970-83
Porsche 911 (930) Turbo 1975-77
Porsche 914-6 1970-76
Porsche 959 1987-88
Diagram Ref No 19
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90110313102
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
12 per engine. Price is for each
Fits:
Porsche 911 1965-83
Porsche 911 (930) Turbo 1975-77
Porsche 914 1970-76
Diagram Ref No 21.
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90110317302
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)

8 per engine. Price is for each.
Connecting rods nuts must be replaced every time they are removed. Do not reuse old rod nuts.
Fits:
Porsche 912 1965-69
Porsche 356 A / B / C 1950-65
Click picture for large parts diagram.
Diagram Ref No 23.
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50203114
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65

3G Mineral Grease: To coat journal prior to use of Plastigauge
3G Silicone Grease: To apply to surface of shell
Lubricants to assist with the measurement of clearance in automotive bearings.
Plastigauge Precision Clearance Gauges
High-Performance Connecting Rods (Con Rods) – Strength, Precision, and Balance for Porsche Engines
Connecting rods — commonly known as con rods — form the vital link between the piston and the crankshaft, converting linear motion into rotational force. In high-performance Porsche engines, con rods endure immense stress, heat, and pressure with every revolution, making their strength, balance, and precision crucial for reliability and performance.
At Design911, we offer a range of precision-engineered
connecting rods designed for both classic and modern Porsche engines.
Manufactured from motorsport-grade materials, these components deliver
exceptional tensile strength, fatigue resistance, and dimensional accuracy —
essential for high-RPM operation, rebuilds, and engine tuning projects.
What Do Connecting Rods Do?
Connecting rods are the mechanical bridge between pistons and the crankshaft, transmitting the force generated during combustion into the crank’s rotational motion.
Core Functions:
- Convert
reciprocating motion into rotation, enabling engine power output.
- Withstand
extreme pressure during every combustion cycle.
- Maintain
piston alignment and crankshaft balance at high speeds.
- Influence engine response and rev characteristics, particularly in performance applications.
Lightweight yet durable connecting rods are critical to maintaining smooth, reliable power delivery across the RPM range.
Why Do Connecting Rods Fail?
Even with Porsche’s engineering precision, connecting rods can degrade or fail due to stress, wear, or improper lubrication — especially under performance driving conditions.
Common Causes of Failure Include:
- Oil
starvation leading to bearing failure or heat damage.
- Over-revving
or detonation causing bending or fatigue cracking.
- Incorrect
torque or clearance during rebuilds.
- Material
fatigue from age, stress, or high-mileage operation.
- Improper lubrication causing friction wear on big-end bearings.
A failing con rod can result in catastrophic engine failure, making proactive inspection and replacement essential during rebuilds or upgrades.
Why Replace with Performance-Grade Connecting Rods?
Upgrading to high-strength connecting rods ensures your Porsche engine maintains optimal balance, durability, and performance under high stress. Whether restoring a classic flat-six or building a tuned turbocharged powerplant, precision rods provide improved reliability and smoother operation.
Key Benefits:
- Increased
strength and fatigue resistance under high-load conditions.
- Enhanced
engine response through reduced rotational mass.
- Maintains
piston-to-crank alignment for smoother operation.
- Ideal for rebuilds, tuning, and performance upgrades.
- Crafted
from premium materials such as forged steel, billet alloy, or
titanium.
- Precision-balanced to reduce vibration and ensure even load distribution.
Motorsport-grade connecting rods deliver the perfect balance of strength and agility, ensuring your Porsche engine performs reliably — whether on the track or road.
Highlights:
- High-performance
con rods engineered for strength and endurance.
- Manufacturer-quality
fitment for seamless integration with Porsche engines.
- Forged
and billet designs available for both naturally aspirated and
turbocharged models.
- Lightweight,
precision-balanced construction for maximum RPM stability.
- Perfect for performance builds, rebuilds, and engine restorations.
- Tested to motorsport standards for strength, fatigue, and dimensional accuracy.