ValveSprings+Retainers- HalferLand Performance Custom Drop-In 10,000 RPM & 30+psi Boost Honda J-Series Valve Springs Set * FITS ALL GEN. MOTORS* (In Partnership with SuperTech) (FREE SHIPPING)

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Your Price: $295.00
Retail Price:$550.00
You Save:$255.00(46%)
PRODUCT IS IN STOCK...READY TO SHIP!!!! PLEASE ALLOW 2-4 BUSINESS DAYS TO PROCESS
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Part Number:10k-ValveSpring-HP

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Add SuperTech Titanium Retainers? SAVE $10 OFF RETAINERS

Feature:

HalferLand Custom Spec Valve Springs Tailored to High HP NA and Boosted Motors

Feature:

10k RPM Capable (See Description for more accurate Spec description)

Feature:

30 - 38 PSI of Boost Capable, Depending on which Cam you're running

Feature:

Made in the U.S.A in Partnership with SuperTech

Feature 5

Backed by our HalferLand Performance (1) Year Guarantee!
HalferLand Performance 
Drop-In 10,000 RPM Honda J-Series Valve Spring Set
- Full 24pc Set -
 (In Partnership with SuperTech) + Add On SuperTech Titanium Retainers


Product Description
~ Note ~ Unless selected/added on, this is just for our HalferLand custom 10k RPM valve springs. You can add on SuperTech Titanium Retainers from the drop down menu.
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





* RETURNS & ORDER CANCELING POLICY*

- ALL ORDERS ARE SUBJECTED TO OUR (1) MONTH (28 DAYS) RETURN POLICY (THIS EXCLUDES ANY PORT AND POLISH PARTS, PNP PART RETURNS/CANCELLING IS BELOW). WE OFFER A NO HASSLE RETURN POLICY ON ANY PARTS WITHIN THE FIRST (28) DAYS OF YOUR PURCHASE. ALL PARTS MUST BE RETURNED IN THEIR ORIGINAL CONDITION, PACKAGING AND NEVER INSTALLED. A FULL INSPECTION WILL BE PERFORMED UPON RECEIVING THE ORDER/PARTS BACK TO US AND IF DETERMINED THE PART WAS INSTALLED OR MODIFIED/DAMAGED THE RETURN WILL BE DENIED. 
ALL REFUNDS AND RETURNS ARE SUBJECT TO A 3.5% CREDIT CARD TRANSACTION FEE. THIS IS DUE TO THE INITAL ORDER TRANSACTION FEE WE WERE CHARGED FOR YOUR ORDER, PLUS THE ADDITONAL REFUND TRANSACTION. THOUGH THERE ARE TWO TRANSACTION FEE'S CHARGED TO US, WE ARE ONLY CHARGING YOU FOR THE REFUND FEE.
- ANY PART RETURNED AFTER THE (28) DAY RETURN POLICY WILL BE SUBJECTED TO A 3% RESTOCKING FEE. 
- FOR TUNING ORDERS, NO RETURNS ARE ACCEPTED UNLESS NO TUNING OR REVISIONS HAVE BEEN STARTED. AFTER OUR FIRST REVISION/TUNE IS SENT TO OUR CUSTOMER VIA EMAIL, NO REFUNDS WILL BE ALLOWED OR AUTHORIZED. THIS APPLIES FOR BOTH SINGLE SESSION (TUNE TILL RIGHT) AND LIFETIME TUNES.

- There are no returns accepted for any Port and Polish parts, due to the parts being modified and unable to be returned to their stock/original condition. There is no exception to this policy...EVER.

- If the customer selected to have HalferLand Performance source/provide a core part(s) and chooses to cancel their order prior to shipping or starting the modifications/porting, a 20% part cost restocking/sourcing fee will be assessed from the credit/return. Example, the core part provided cost $100, a 20% Restock/Sourcing fee of $20 will be deducted from the credit of the order. This is due to our cost to source, purchase, clean the part and now the order being cancelled, we now are forced to sit on the part with direct order being associated with it or that we can use it for. 

- Order Cancelling may be done prior to the start of any modification or work and before shipping. If the parts modifications has already been begun or the parts has shipped, then the order cannot be canceled and will be filled/finished accordingly. If its a non PnP part and the order ships, the customer is responsible for returning the part/order using their preferred carrier. Our (28) Day Return Policy guidelines remain, parts must be returned in original packaging, never installed, modified or damaged


5 Stars
TL Owner
Bought these just to rev higher on my daily. Install went perfect and these things are way stiffer then stock. Thus far, they're perfect. Oh and the price was nice too. Best I could find on the web, actually one of the only outside 1 other.
Did you find this helpful?  4 of 4 Found Helpful
Reviewed by:  from USA. on 12/11/2019
5
4 Stars
Spring
they look quaility pieces. install was tough me as im not sure how wish instruction came with parts. had a shop install and is running fast now as they say to 7800 J30 accord thank you friend for good part
Did you find this helpful?  4 of 4 Found Helpful
Reviewed by:  from austin TX. on 10/24/2019
4
5 Stars
Had to rev higher to compete with these damn K Swap EG's everywhere. The same night as install took this bad girl (J35a3 EK coupe) to 7500 and finally had just enough to beat there asses LMAO. I then turned it up 7800 (scared but did, not for the springs but the motor internals LOL) and had a car on him. Dope product brother, keep them coming. Props for the love you're showing all the DIY guys, unlike those big shops/Teams
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from . on 11/21/2019
5
5 Stars
10k rpm Springs
Need a set for my boost Civic swap (j30a1). Not much to say outside the are cranking to 8500rpm with zero issues. Good price too.
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from NA. on 11/13/2019
5
5 Stars
They do what they say
beng in partner with Supetech i knew they would be quaility. installed with stock retainer and zero issues. all these people dogging halferland for saying they can be ran like that but ive followed his builds that were setup the same and he doesnt have issue and i have over 15k mile of stupid driving in my 450whp J35 swap Integra...SOOOO... LOL
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from work. on 4/22/2021
5
5 Stars
Customer service is great!
I ordered these late Friday afternoon and had tracking within 2 hours. Parts arrived before 9am the following Monday! Very pleased with the service!
Did you find this helpful?  3 of 4 Found Helpful
Reviewed by:  from GA. on 12/23/2019
5
5 Stars
bad ass springs!
Perfect install, performance perfect, great price....mic drop
Did you find this helpful?  2 of 3 Found Helpful
Reviewed by:  from shhhh. on 10/10/2019
5
5 Stars
Great purchase
Overall great product. Revving my J32 out to 8k with their Halferland stage 2 cams and picked up 34whp on a mustang dyno and everyone knows mustangs read very low so on a dynojet I gurantee we would have seen 40+who gains. I gotta say we did pair them with HalferLand stage 2 PnP heads which were pricy but our power curve is amazing.
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Reviewed by:  from Dallas. on 2/25/2022
5

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