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Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake
Load image into Gallery viewer, Thunderstroke® Stage 1 Performance Air Intake

Thunderstroke® Stage 1 Performance Air Intake

Indian Motorcycle

Regular price $519.99

Unit price per 

Color

only 3 left in stock

3% increase in Horsepower. The key to making power with any engine is abundant air and fuel flow into the combustion chamber. Swapping your stock air filter for this Stage 1 High Performance Air Cleaner is a great way to create more power and improve acceleration. This waterproof Stage 1 Performance Air Cleaner is designed with non-woven media to improve power through better flow, and provides high-efficiency cleaning to protect your engine from damaging dirt and debris. The synthetic filtration media operates at a high-filtration efficiency and conveniently requires no filter re-washing like other paper-based or washable filtration systems. The muscle car-inspired design increases the volumetric efficiency and creates a ram air effect, which increases engine power as you increase the speed of the motorcycle. Variable length fins inside the intake tract are tuned to optimize and smooth the airflow inside the housing. The steel cover provides the same legroom as stock. Adding the final bit of style is the iconic Indian® script logo embossed across the face of the housing cover. 

 

This complete kit conveniently includes the required Calibration Code that upgrades the Engine Control Module (ECM) software from stock to Stage 1, allowing this kit to be properly installed by your dealer. No additional software purchase necessary.  Each kit is designated with a warning triangle to indicate the restrictions that may apply. Click on the link below to review potential regulatory penalties for inappropriate installations of this item.

Important Regulatory Information

  • One Thunderstroke® Stage One Performance Air Intake
  • 3% increase in horsepower over stock
  • Ram air intake with internal channels for a smoother delivery
  • Non-woven, synthetic filtration media for high-filtration efficiency without re-washing
  • Comes with Air Cleaner Assembly, Filter Media, Stage 1 Calibration, and Installation Hardware

Fits

  • 2021 Vintage Dark Horse
  • 2021 Roadmaster Limited
  • 2020-2021 Roadmaster Dark Horse
  • 2020-2021 Indian Vintage
  • 2020, 2017-2018 Chieftain Elite
  • 2020 Indian Chief Dark Horse
  • 2018-2021 Springfield Dark Horse
  • 2018-2020 Roadmaster Elite
  • 2018-2020 Chieftain Classic
  • 2018 Chief
  • 2017-2021 Chieftain Limited
  • 2017-2018 Roadmaster Classic
  • 2016-2021 Springfield
  • 2016-2021 Chieftain Dark Horse
  • 2016-2019 Chief Dark Horse
  • 2015-2021 Roadmaster
  • 2014-2021 Chieftain
  • 2014-2019 Chief Vintage
  • 2014-2018 Chief Classic

Indian Motorcycle Sizing Chart (Men's)

Open tab
  Chest Inside Leg
Size Inches Inches
XS 32.7 31.5
S 36.2 31.9
M 39.8 32.3
L 43.3 32.9
XL 46.9 33.5
2XL 50.4 34.1
3XL 53.9 34.6
4XL 57.9 35.2
5XL 61.8 35.8

 

Men's Measurements

To find your clothing size:

  • Remove bulky clothing

  • Remove shoes when measuring

  • Measure with your feet together

  • Take body measurements in circumference

Men's Size Chart Image

Indian Motorcycle Sizing Chart (Women's)

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Indian Motorcycle Women’s Sizing Chart

 

Chest

Waist

Hips

Inside Leg

Size

Inches

Inches

Inches

Inches

XS

32.7

25.6

36.2

30.3

S

35

28

28.6

30.7

M

37.4

30.3

40.9

31.1

L

39.8

32.7

43.3

31.5

2XL

46.1

39

49.6

32.7

3XL

49.2

42.1

52.8

33.3

 

Women's Measurements

To find your clothing size:

  • Remove bulky clothing

  • Remove shoes when measuring

  • Measure with your feet together

  • Take body measurements in circumference

 
Women's Size Chart

Indian Motorcycle Helmet Sizing Chart

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We cannot accept returns on helmets! Please make sure the helmet fits before purchasing! Please use sizing chart below. 

Size

IN

CM

XS

21.3

54

S

21.7-22

55-56

M

22.4-22.8

57-58

L

23.2-23.6

59-60

XL

24-24.4

61-62

2XL

24.8-25.2

63-64

3XL

25.6-26

65-66

4XL

26.4-26.8

67-68


Helmet Measurements

All measurements are in circumference

Indian Motorcycle Footwear Sizing Chart (Men's)

Open tab
 USA IN CM
7 9.8 25
8 10.2 26
9 10.6 27
10 11 28
11 11.4 29
12 11.8 30
13 12.2 31
14 12.6 32


Indian Motorcycle Footwear Sizing Chart (Women's)

Open tab
 USA IN CM
5 8.7 22
6 9 23
7 9.4 24
8 9.8 25
9 10.2 26
10 10.6 27
11 11 28


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