High Horse Performance, Inc.Answer
Oct 03, 2025 - 11:03 AM
Typically for boost we go with NGK 6509 up to 600rwhp, above that NGK 6510. These 2309 are a for crush washer seat style heads, yours is tapered seat.
If you have further questions, or would like to place an order, please email sales@highhorseperformance.com or call us at 888-894-1115 M-F 9am-6pm est
If you have further questions, or would like to place an order, please email sales@highhorseperformance.com or call us at 888-894-1115 M-F 9am-6pm est
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