Subcategories
3" tall velocity stack with backing plate kit for modified and ported heads. Fits M8 throttle body 3-hole bolt pattern. 4" opening tapering to 64 mm ID. Includes backing plate and hardware. Made in the USA.
OE replacement engine coolant temperature sensor. Made in the USA.
Electronic sensor that measures cylinder head temperature and sends data to the ECU to aid timing and fuel ratio. Made in the USA.
Premium Feuling High Load Beehive® valve spring kit for performance engines. Allows up to 0.750" lift; includes 10° titanium retainers, chromoly spring seats and Viton® seals. Made in USA.
Premium High‑Load BeeHive® valve spring kit engineered for high‑lift cams. Includes lightweight 10° retainers, machined spring seats, shims, locks and Viton® seals. Up to 0.750" lift; coil bind 1.125"; made in the USA.
High-quality Viton® seals for high-temperature engine use. Spring-loaded wiper minimizes valve stem friction. Made in the USA.
Raises valve spring retainer to gain 0.050" installed height without machining the cylinder head spring set. Made in the USA.
High-fatigue Beehive® valve spring kit for performance engines; direct replacement for many Big Twin and XL models.
Complete rocker box fastener kit with rolled threads, wide under-head flange, 170,000 psi tensile strength, and 12-point chrome moly bolts for TC Dyna, FL '01-'17 and Softail '02-'17.
- Precision j-form threads prevent galling and ensure consistent torque loading.
- Tensile strength rated at 180,000 psi; stronger than OEM and grade 8 fasteners.
- Complete kit for one motor; includes moly assembly lubricant.
- Made in the USA.
Precision-rolled threads and a wide under-head flange ensure consistent torque and reliable sealing. 12-point hardened stainless steel with SHOW polish; includes moly assembly lubricant. Made in USA.
- Precision j-form threads to prevent galling and ensure consistent torque loading.
- 180,000 psi tensile strength; stronger than OEM and grade 8 fasteners.
- Complete kit for one motor plus moly assembly lubricant included.
- Made in the USA.
Precision-rolled threads and wide underhead flange for reliable sealing. Includes moly lubricant and 170,000 psi tensile strength. Not for '23 121" VVT models.
Fastener set that helps prevent M8 cylinder head cracking; made in the USA.
- High-temperature resistant Viton® construction
- Spring-loaded wiper clears excess oil with minimal friction
- Made in the USA
Complete hardware set for M8 Softail chassis with fine-thread components and ultra torque lube. Made in the USA.
Precision-rolled threads, wide underhead flange, 170,000 psi tensile rating, ARP-manufactured, includes moly assembly lubricant. Not for 2023 121" VVT motors.