Products – JA-Modified Racing Performance

Our Products

PERFORMANCE ENGINE INTERNALS

Browse by brand and engine platform. Click an engine code to view detailed specs and available part numbers.

Click an engine code to view full product details, images, and specifications.

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AVEA888001	82.5mm	29.6mm	23mm	9.0/9.3/9.5/9.6	Golf7 / GEN3 Race / A4 Q5 2.0L
AVEA888002	83mm	29.6mm	23mm	9.3/9.5	VW/AUDI 2.0TFSI / VAG 2.0T

EA111

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AVEA111001	76.5mm	28.5mm	20mm	9.5/10.0	1.4TFSI

EA211

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AVEA211001	74.5mm	26.0mm	19mm	10.0	1.4T EVO

EA855

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AVEA855001	84.5mm	32mm	23mm	9.3	2017+ Audi RS3 2.5T DAZA

EA113

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AVEA1.8T001	81mm	29.6mm	23mm	9.0	EA113 1.8T 20V
AVEA2.0T001	82.5mm	29.6mm	23mm	10.0	EA113 2.0T 20V

VR6

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AV1992VR6JP001	82.5mm	32.39mm	23mm	9.0/10.5	1992-99 VR6 12V GTI/JETTA
AV1999VR6001	82.5mm	42.82mm	23mm	8.5/11.1	2.8L 24V VR6
AV2001VR6001	82.5mm	40.44mm	23mm	8.5/11.5	3.2L 24V VR6 R32

1JZ

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT1JZ001	86mm	30.5mm	22mm	8.5/9.0	1JZ-GTE/GE

2JZ

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT2JZ001	86mm	30.5mm	22mm	8.5/9.0/9.5	2JZ-GTE VVT-i
AT2JZ002	86.5mm	30.5mm	22mm	9.0	2JZ-GTE Non-VVT-i

2UZ

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT2UZ001	94mm	32.0mm	24mm	9.6	2UZ-FE V8

3UZ

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT3UZ001	91mm	31.0mm	22mm	—	3UZ-FE V8

2GR

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT2GR001	94mm	28.5mm	22mm	—	2GR-FE V6

2TR

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AT2TR001	95mm	28.4mm	22mm	9.2	2TR-FE

FA20

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASFA20001	86mm	28.3mm	22mm	12.5	BRZ/86 FA20

EJ20

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASEJ20001	92mm	32.7mm	22mm	8.5	EJ20 WRX/STI

EJ25

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASEJ25001	99.5mm	32.7mm	22mm	8.5/9.0	EJ257 STI

K20

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHK20AC001	86mm	30mm	19.96mm	12.5	K20/K20A/K20C
AHK20AC002	86.5mm	30mm	19.96mm	12.5	K20 NA

L15A/L15B

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHL15B001~006	73-74mm	26.2mm	19.96mm	12.5-13	L15B(GEN X) / GK5

R18

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHR18001	81mm	28.8mm	20mm	—	R18 Civic

K24

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHK24N001~003	87-87.5mm	30mm	19.96mm	12.5	K24 NA
AHK24T001~002	86mm	30mm	20mm	9.0/10.5	K24 Turbo

GK5

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHGENX001~002	73mm	26.2mm	19.96mm	10.3	Fit/Jazz GK5

B18/B20

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AHB18A1B1001~004	81-81.5mm	30mm	21mm	9.0/10.5	B18A1/B1

4G63

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4G63001	85mm	32.7mm	22mm	8.5/9.0	EVO I-IX

4G93

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4G93001	81mm	30.5mm	21mm	9.0	4G93 MIVEC

4B11

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4B11001	86mm	29.6mm	21mm	9.0	EVO X

4G6X

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4G6X001	85mm	32.7mm	22mm	—	4G6X series

4G93T

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4G93T001	81mm	30.5mm	21mm	8.5	4G93T Turbo

4B12

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
AM4B12001	88mm	28.7mm	21mm	—	4B12

B48

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABB48001	82mm	28.2mm	20mm	9.5/10.0	B48 2.0T

N20

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABN20001	84mm	28.0mm	21mm	9.5	N20 2.0T

N54

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABN54001	84mm	30.0mm	22mm	8.5/9.0	N54 3.0T

B58

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABB58001	82mm	28.5mm	21mm	9.5	B58 3.0T

S58 B30

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABS58001	84mm	28.5mm	22mm	9.3	S58 M3/M4

N55

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABN55001	84mm	30.0mm	22mm	8.5/9.0	N55 3.0T

M271

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABM271001	82mm	28.5mm	21mm	9.5	M271 1.8T

M155

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABM155001	82mm	29.0mm	22mm	—	M155 A45 AMG

M260/M270

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABM260001	83mm	28.0mm	21mm	9.5	M260 2.0T

M274

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABM274001	83mm	28.0mm	21mm	9.5	M274 2.0T

M157

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABM157001	85mm	30.0mm	23mm	9.0	M157 5.5T V8

Smart

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ABSMART001	72mm	25.0mm	18mm	—	Smart 1.0T

1630

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASD1630001	100mm	30.0mm	22mm	8.5	RXTX 300

GTI

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASDGTI001	100mm	30.0mm	22mm	9.0	GTI 130

130

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASD130001	100mm	30.0mm	22mm	9.5	130hp ACE

1503

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASD1503001	100mm	30.0mm	22mm	—	1503 ACE

GTX

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASDGTX001	100mm	30.0mm	22mm	8.5	GTX 155/215

170

Part #	Bore	Comp.Ht	Pin	Comp.Ratio	Application
ASD170001	100mm	30.0mm	22mm	—	170hp ACE

Material Selection Guide

Choosing the Right Connecting Rod: 4340 · 300M · Titanium

JA-Modified offers connecting rods in three materials — each engineered for a specific power band and use case. Here's how to choose the right one for your engine build.

Baseline

4340 Chromoly

300 – 1,200 HP

Best for: Street builds, mild race, first upgrade

Strength: 1,480–1,620 MPa tensile

Weight: Baseline (7.85 g/cm³)

ARP 2000 ARP L19

Max Strength

Upgrade

300M Alloy Steel

$$$

800 – 2,500+ HP

Best for: Big turbo, drag, endurance

Strength: 1,930–2,070 MPa tensile (40% > 4340)

Weight: Same as 4340

ARP 625+ ARP L19

Premium

Titanium Ti-6Al-4V

⚡ Specific Fatigue Strength

Titanium's fatigue limit is ~450-550 MPa — about 10-15% lower than 300M in absolute terms. But when you factor in density, titanium's specific fatigue strength is 40-50% higher (100-124 vs 66-83 MPa·cm³/g). This means a titanium rod of the same fatigue capacity weighs 35-40% less — less reciprocating mass = higher RPM ceiling and lower bearing stress.

⚠ Not about max HP

Titanium's absolute fatigue limit (450-550 MPa) is 10-15% lower than 300M's (520-650 MPa), but titanium's specific fatigue strength (fatigue limit ÷ density) is 40-50% higher — 100-124 vs 66-83 MPa·cm³/g. That means every gram of titanium carries more fatigue load than a gram of steel. Combined with 44% weight savings, titanium rods dramatically reduce reciprocating inertia, making them ideal where 9,000+ RPM acceleration and throttle response matter more than peak boost pressure. GT3, Formula, and high-RPM NA builds choose titanium for this reason.

$$$$

500-1,500

HP Range

10,000+

RPM Capable

40-50%

Better Sp. Fatigue

Best for: High-RPM NA, road race, supercar

Fatigue limit: 450–550 MPa (vs 300M: 520-650 MPa)

Weight: 44% lighter vs steel

Titanium Bolts ARP 625+*

* Coated to prevent galvanic corrosion

⚡ Quick Guide: Under 1,000 HP? 4340 — the proven workhorse. 1,200+ HP on big boost? 300M — highest strength, toughest under extreme cylinder pressure. High-RPM NA or track build where 9,000+ RPM is the goal? Titanium — 44% lighter for faster revs and better throttle response. Why compare them by HP? Because titanium and 300M serve different jobs. 300M = brute force for max boost. Titanium = light weight for max RPM. Pick the right tool for your build. Not sure? Talk to us →

Click an engine code to see connecting rod part numbers and specifications.

EA888

Part #	Engine	Material	Design
VW-EA888-ROD001	EA888	4340 Steel	H-Beam

EA111

Part #	Engine	Material	Design
VW-EA111-ROD001	EA111 1.4T	4340 Steel	H-Beam

EA211

Part #	Engine	Material	Design
VW-EA211-ROD001	EA211	4340 Steel	H-Beam

EA855

Part #	Engine	Material	Design
VW-EA855-ROD001	EA855 2.5T	4340 Steel	H-Beam
VW-EA855-ROD002	EA855 2.5T	300M Steel	H-Beam

EA113

Part #	Engine	Material	Design
AUDI-1.8T00101	1.8T 20V	4340 Steel	I-Beam

VR6

Part #	Engine	Material	Design
VW-VR600101	VR6	4340 Steel	H-Beam

1JZ

Part #	Engine	Material	Design
TYT-1JZ-ROD001	1JZ-GTE	4340 Steel	H-Beam

2JZ

Part #	Engine	Material	Design
TYT-2JZ-ROD001	2JZ-GTE	4340/300M	H/I-Beam

K20

Part #	Engine	Material	Design
HON-K20-ROD001	K20A/K20C	4340 Steel	IQ-Beam 139mm
HON-K20-ROD002	K20A/K20C	4340 Steel	IQ-Beam 139mm JA

K24

Part #	Engine	Material	Design
HON-K24-ROD001	K24A	4340 Steel	I-Beam 151.99mm
HON-K24-ROD002	K24A	4340 Steel	IQ-Beam 152mm JA
HON-K24-ROD003	K24A	4340 Steel	X-Beam 152mm

B20

Part #	Engine	Material	Design
HON-B20-ROD001	B20A/B20B	4340 Steel	Forged

GK5 L15B

Part #	Engine	Material	Design
HON-GK5-ROD001	L15B/L15B2	4340 Steel	X-Beam

FA20

Part #	Engine	Material	Design
SUB-FA20-ROD001	FA20	4340 Steel	I-Beam 129.3mm

4G63

Part #	Engine	Material	Design
MIT-4G63-ROD001	4G63-T	4340 Steel	I-Beam 150mm

M177/M176

Part #	Engine	Material	Design
MB-M177-ROD001	M177/M176	4340 Steel	I-Beam

RXP / GTX

Part #	Engine	Material	Design
SDO-RXP-ROD001	RXP 1.5L	4340 Steel	Forged

📦 MLS Head Gaskets

Multi-layer steel gaskets for EA888, 2JZ, K-Series. FKM coated, 0.5-1.5mm thickness options.

⚙ Camshafts

CNC-ground billet camshafts. 8620 steel, VVT compatible. EA888, 2JZ, K-Series.

🔥 Performance Turbos

Selected turbocharger programs backed by trusted manufacturing resources.

🌬 Intake Manifolds

High-flow intake manifolds for performance applications.

🔧 Clutch Systems

Performance clutch systems for high horsepower builds.

🛠 Custom Development

Camshafts, crankshafts, valve train, and specialized racing parts. Tell us your project.