Normal piston & guide are OK.
「XB130S」
Product Code : 0450
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Completely Variable pitch.This element is essential to be light pull & the high output.
For normal size (inner diameter) piston & spring guide.

A reason of highly durability,we not use machine,all hand made.The material is Silicon chrome steel which use car suspension or train.

 
￥1,300(Fixed)　→ SALE910 YEN
Our Spring may not be correct response.Because our springs are made by craftsman.
Our springs couldn't be made by machines because we need to make with variable pitch(some machines couldn't make that completely) ,so it may happen 10% up & down.
And please check your upgrade parts.If you use HI-SP cylinder kit,it may be down a few output.
If you want PDI parts,please mail to us.E-mail address is ask@x-fire.org