Kelford Package-Neo | RB25DET NEO
SERIOUS RACING ENGINE UPGRADE
244HV-A
264°/272° | 10.8mm/10.8mm Valve Lift
Note: This kit is shimless and requires a qualified trades person to machine and setup the head for best results.
– Intake requires a 45.10mm-45.40mm Tip height
– Exhaust requires 49.00mm-49.30mm Tip height
These tip heights will get valve clearances close, machine the tip of the valves to set the correct clearances. Best results are done using a torque plate.
244HV-B
KVS244-BT
Designed for high-boost, high-RPM racing, this kit features Kelford’s shimless bucket package and ultra-clean Silicon Chrome spring steel for excellent fatigue resistance. The high-frequency springs minimize surge at elevated RPMs, while the titanium retainers eliminate the need for shims. Ideal for maximizing RB engine performance.
- 110lb seat pressure at 36.0mm installed height.
- 230lbs at 11.0mm valve lift. Coil bind at 22.0mm. 13.0mm max lift.
- Includes spring seats to set the correct spring installed height.
CF-34/6.5+
Cam Follower 34mm x 6.5mm.
- Full set x 24
FERREA Intake & Exhaust Set
VAL-244-IN-12
FERREA +1.00MM NISSAN RB25 NEO “CUSTOM” INTAKE SET (Shimless) 35.15mm, 5.98mm, 103.90mm, 6.20mm. Cut seat to achieve 45.10mm-45.40mm tip height.
VAL-244-EX-12
FERREA +1.00MM NISSAN RB25 NEO “CUSTOM” EXHAUST SET (Shimless) 30.65mm, 5.96mm, 104.35mm, 10.1mm. Cut seat to achieve 49.00mm-49.30mm tip height.
K10063
Nissan 6° Radius Bead lock
VG231-IN / VG231-EX
Manganese Bronze Valve Guides 10.03mm O/D 5.95mm I/D with Stopper
VS-N6I-12 / VS-N6E-12
Stem 6mm. Guide OD 10mm. Seal OD 12.6mm. Polyacrylic.
264°/272° | 10.8mm/10.8mm Valve Lift
Note: This kit is shimless and requires a qualified trades person to machine and setup the head for best results.
– Intake requires a 45.10mm-45.40mm Tip height
– Exhaust requires 49.00mm-49.30mm Tip height
These tip heights will get valve clearances close, machine the tip of the valves to set the correct clearances. Best results are done using a torque plate.
244HV-B
Designed for high-boost, high-RPM racing, this kit features Kelford’s shimless bucket package and ultra-clean Silicon Chrome spring steel for excellent fatigue resistance. The high-frequency springs minimize surge at elevated RPMs, while the titanium retainers eliminate the need for shims. Ideal for maximizing RB engine performance.
- 110lb seat pressure at 36.0mm installed height.
- 230lbs at 11.0mm valve lift. Coil bind at 22.0mm. 13.0mm max lift.
- Includes spring seats to set the correct spring installed height.
Cam Follower 34mm x 6.5mm.
- Full set x 24
VAL-244-IN-12
FERREA +1.00MM NISSAN RB25 NEO “CUSTOM” INTAKE SET (Shimless) 35.15mm, 5.98mm, 103.90mm, 6.20mm. Cut seat to achieve 45.10mm-45.40mm tip height.
VAL-244-EX-12
FERREA +1.00MM NISSAN RB25 NEO “CUSTOM” EXHAUST SET (Shimless) 30.65mm, 5.96mm, 104.35mm, 10.1mm. Cut seat to achieve 49.00mm-49.30mm tip height.
Nissan 6° Radius Bead lock
Manganese Bronze Valve Guides 10.03mm O/D 5.95mm I/D with Stopper
Stem 6mm. Guide OD 10mm. Seal OD 12.6mm. Polyacrylic.
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