Drop-In 10,000 RPM Honda J-Series Valve Spring Set
- Full 24pc Set -
(In Partnership with SuperTech)
WE ARE PROUD TO ANNOUNCE OUR HALFERLAND 10k RPM (MAX .490 Valve Lift) DROP IN HONDA J-SERIES VALVE SPRINGS ARE IN. OUR KIT ALLOWS YOU TO KEEP STOCK RETAINERS AND SEATS, REDUCING THE COST TO ONLY $275 FOR OUR FULL (24)pc SET AND ALSO KEEPS IT A 100% DROP IN AFFAIR !!!!
There was a fine line to walk in regards to valve train wear, as unlike other companies full race, super stiff springs that will hold nearly 50psi of boost, we wanted to make sure our customers could run our springs daily, on stock valve train (or you can swap to SuperTech Titanium which are compatible) and not see the excessive wear that those nearly 50psi of boost springs will cause. Ultimately it will be the customers choice to run stock or titanium retainers, but we have have tested them extensively on multiple vehicles for over 25,000 miles NA and on Boost, with ZERO Issues. If you plan to take your Jseries beyond 8k rpm (which very rarely does a Jseries make power that high unless you machined the heads to fit a "Big" cam) at that point we would suggest Titanium Retainers.
These will fit ALL, AGAIN ALL J-SERIES MOTORS from Gen 1, Gen 2 and Gen 3. This now allows our customers the ability to purchase a complete HalferLand Stage 2 CamShaft and 10k RPM Drop in Valve Springs KIT all in one shot/order (also available as an add on through our Stage 2 Cam listing)....While also having the confidence your valve springs were designed around and tested for the exact Camshaft you are installing. Our HalferLand Stage 2 cams are also 100% Drop In affair, No spacers of funky stuff needed, just select the appropriate Gen Motor you have, with the Motor breakdown list located in the motor selection drop down near pricing or in the cam listing description.
We cannot thank SuperTech enough for the support and customer service their entire team showed us! They were extremely helpful in helping us determine the specs we felt would suite just about every Honda J-Series build out there from 280-1000whp (we will also have a much stiffer spring coming that will be targeted for the “Full Race Teams” that machine their heads to allow for stupid high lift and Cam Specs, which the stock heads can’t fit). Whether you purchase Supertech current Spring and Retainer Kit, or purchase our HalferLand Performance 10k RPM Drop in Valve Springs which utilize the stock retainers and keepers (OEM Retainers -which are shown to perform up to 1000hp), rest assure that you will be getting a solid product and backing from two awesome companies!
SPRING SPECS & FEATURES
- RPM Range = 0 -10,000rpm
(WE MUST NOTE THAT WE DO NOT SUGGEST TAKING A J-SERIES MOTOR TO 10K RPMS, THEY SIMPLY DO NOT MAKE POWER THAT HIGH. THE RPM RATING IS LISTED TO SHOW THE SPRINGS STIFFNESS AND RESILIENCY TO VALVE FLOAT OR BOOST)
- Max Valve Lift = .490 @ .050"
- Allows you to reuse stock Retainers and Keepers
Boost Capabilites = +/- 1-2psi
36+ psi on OEM Cams
30+ psi of boost on our Stage 2 Cams
- HalferLand (1) Year Guarantee