These are all genuine Stihl OEM parts for the Stihl HS45 hedge trimmer.

1 Flywheel 4140 400 1200 41404001200

2 Collar Nut M8x1 0000 955 0802 00009550802

3,4,5 Ignition Module 4140 400 1314 41404001314

6 Connector Tag 4140 431 2100 41404312100

7 Pan Head Self-Tapping Screw Is-D4x22 9075 478 3023 90754783023

8 Spiral Housing 4228 084 1102 42280841102

9 Spiral housing 4228 084 1100 42280841100

10 Pan Head Self-Tapping Screw Is-D5x24 9075 478 4159 90754784159

11 Muffler 4228 140 0600 42281400600

12 Muffler (incl. 13) 4228 140 0601 42281400601

13 Stub with screen 4128 140 6900 41281406900

14 Muffler Gasket 4140 149 0602 41401490602

15 Pan Head Self-Tapping Screw Is-D5x60 9075 478 4268 90754784268

16 Clutch 4228 160 2000 42281602000

17 Tension Spring 4228 162 7903 42281627903

for search: stihl hs45 Flywheel 4140 400 1200 41404001200, stihl hs45 Collar Nut M8x1 0000 955 0802 00009550802, stihl hs45 Ignition Module 4140 400 1314 41404001314, stihl hs45 Connector Tag 4140 431 2100 41404312100, stihl hs45 Pan Head Self-Tapping Screw Is-D4x22 9075 478 3023 90754783023, stihl hs45 Spiral Housing 4228 084 1102 42280841102, stihl hs45 Spiral housing 4228 084 1100 42280841100, stihl hs45 Pan Head Self-Tapping Screw Is-D5x24 9075 478 4159 90754784159, stihl hs45 Muffler 4228 140 0600 42281400600, stihl hs45 Muffler 4228 140 0601 42281400601, stihl hs45 Stub with screen 4128 140 6900 41281406900, stihl hs45 Muffler Gasket 4140 149 0602 41401490602, stihl hs45 Pan Head Self-Tapping Screw Is-D5x60 9075 478 4268 90754784268, stihl hs45 Clutch 4228 160 2000 42281602000, stihl hs45 Tension Spring 4228 162 7903 42281627903