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49% off
Quantity
1
Description
5.0
4 ratings
5
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2
1
Exactly what I was looking for!
Adam · December 10, 2024
An excellent upgrade option for factory spark plugs. Stably maintains boost at 27psi, without loss of power. When switching to colder spark plugs, it was not possible to increase the advance angle without losing power. With a boost above 27 psi we usually use spark plugs with a heat rating of 8-9(NGK BKR8EIX, BKR9EIX or HKS M40i, M45i)
Timur · May 19, 2024






