ModMax Valve Spring Kits

Our new Valve Spring Kits are required in high performance applications. These new springs are manufactured from super clean alloys to exacting tolerances for long life and additional pressure for SOHC and DOHC engines. The springs feature up to 30% more pressure than OEM springs and allow higher RPM as well as less chance of valve float on boosted applications where additional pressure is being applied to the backside of the intake valve. These spring kits also allow more lift associated with aftermarket camshafts. The ’96-’98 SOHC spring kits will accommodate up to .531” lift, ’99 and up SOHC spring kits will take up to .600” lift, and DOHC kits will work well up to .500” lift. They are manufactured for a drop-in installation with no special machining required. Simply remove the stock springs, retainers, and locks and replace them with our kits. Kits include: high performance valve springs, titanium CNC machined aerospace alloy retainers, and multi-groove keepers. Works with OEM or aftermarket stainless steel valves.

ModMax 305-25001 $270.24 set
’96-’98 SOHC and FRPP SVO SOHC Valve Spring Kit

ModMax 305-25002 $270.24 set
’99 and UP SOHC Valve Spring Kit

ModMax 305-25004 $531.84 set
’96 and UP DOHC and FR500 DOHC Valve Spring Kit

 

ModMax Valve Springs

We are happy to offer our ModMax performance valve springs individually for custom engine builders or simply as replacements

ModMax 305-00546 $4.88ea.
’96-’98 SOHC and FRPP SVO SOHC Hi-Performance Valve Spring
(86# on the seat and 191# at .472" lift. Max lift .531")

ModMax 305-25146 $4.88ea.
’99 and UP SOHC Hi-Performance Valve Spring
(87# on the seat and 202# at .531" lift. Max lift .600")

ModMax 305-25246 $4.61ea.
’96 and UP DOHC and FR500 DOHC
Hi-Performance Valve Spring
(89# on the seat and 202# at .450" lift. Max lift .500")

ModMax 305-25446 $4.00
OEM Replacement 4.6 DOHC Valve Spring (not high performance)
(60# on the seat and 160# at .394" lift. Max lift .400")

ModMax Spring Retainers

Our Performance and OEM valve spring retainers are available individually for custom engine builders or simply as replacements

ModMax 301-25000 $11.76ea.
Titanium Retainers for use with ModMax Hi-Performance Springs

ModMax 300-25000 $2.75ea.
Chrome Moly Steel Retainer for use with OEM SOHC or DOHC Springs

ModMax 300-25001 $1.00ea.
Powdered metal retainer. OEM Replacement for all SOHC and DOHC

 

ModMax Valve Keepers

Our Performance and OEM valve spring keepers are available individually for custom engine builders or simply as replacements

ModMax 400-25771 $0.25 pair
Stock multi-groove style keeper.
Works with OEM or ModMax retainers & valves

ModMax 400-25772 $128.80 set 32
Chrome Moly Single groove keeper.
For use with certain ModMax & Manley Valves

 

ModMax Lash Caps

Our offers lash caps for applications where more length is needed on the valve. This is commonly used to correct geometry for with reground camshafts, small base circle cams, and valves that are too short. They are .080" thick and are specially machined for use with 4.6 and 5.4 followers.
These work on all SOHC and DOHC engines.

ModMax 410-25000 $6.00ea.
.080" Lash Cap 7mm SOHC and DOHC 4.6/5.4

 

Modmax DOHC Valve Seats

Our valve seats are required when putting our +2mm valves in DOHC cylinder heads. OEM seatswill not work with the larger valves. These may also be used for custom porting applications.

ModMax 415-25002 $16.00ea.
'96 and UP DOHC Large Intake Valve Seat

ModMax 415-25004 $16.00ea.
'96 and UP DOHC Exhaust Valve Seat

 

ModMax Bronze Valve Guides

Our new bronze valve guides replace the stock iron guides for high performance applications. They are manufactured from Manganese Bronze for long life and durability. We have applications for both SOHC nd DOHC cylinder heads. SOHC designs utilize the oem seal while the DOHC models are machined for a positive type aftermarket seal. NOTE: ModMax 350-254000 seals must be used with DOHC bronze guides

ModMax 470-25002 $6.00ea.
All 4.6 SOHC Bronze Valve Guides

ModMax 470-25004 $6.00ea.
All 4.6 DOHC Bronze Valve Guides
(must use special seal)

 

ModMax Valve Seals

We have replacement and after market valve seals for your DOHC or SOHC 4.6 and 5.4 engines. For the DOHC engines we offer stock replacement seals and aftermarket seals for our bronze guides. Stock replacement seals for the SOHC drop in over stock or our bronze replacement guides.

ModMax 350-25100 $2.50ea.
4.6&5.4 SOHC Style Valve Seal

ModMax 350-25200 $2.50ea.
4.6&5.4 DOHC Style Valve Seal

ModMax 350-25400 $4.00ea
4.6&5.4 DOHC Postive Style Seal
(Use with ModMax 470-25004 Bronze Guides)

 

 

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