MWR Lash Adjuster and Rocker Retainer Kit – Lotus/Toyota 2GR


SKU: MWR-301157 Category: Brand:


An MWR Exclusive!!

All 3.5L Lotus/Toyota 2GR-FE engines 2005-17
All 3.5L Lotus/Toyota 2GR-FKS engines 2015+
All 3.5L Lotus/Toyota 2GR-FSE engines 2007+ (Does NOT work with OEM forged type roller rocker – must switch to stamped type rocker NEW or USED)


(24) Upgraded hydraulic lash adjusters (HLA)
(24) Rocker retainer clips
Rockers NOT included – works with your original rockers
NOTHING else required for install, this kit is all parts needed to upgrade one engine.


The ZR/GR/UR family’s roller/rocker style valvetrain allows for reliable, quiet performance and excellent performance camshaft profiles but it has a weak point. Above 7300rpm the lash adjusters fail to maintain adequate control of the rockers, and the rockers sometimes escape their proper position and fling loose. This causes a valve to no longer open, and can even cause severe damage to the cylinder head, valve cover and camshaft.

MWR’s improved hydraulic lash adjusters offer superior control at high rpm, and are also custom designed to allow us to add a rocker retainer clip (included). Better control and no possibility of the rocker bouncing itself free means you can confidently rev your engine as high as the rest of your build allows.

In our test engine equipped with MWR stage 3 cams and MWR upgraded valve springs and titanium retainers we have revved to 8800rpm+ with no signs of valve float or lifter pump-up or collapse.  These parts are engineered to go to 9500+ with the right build.

Warning: do not rev beyond the physical limitations of the other rotating and reciprocating components in your engine!!

Additional information

Weight 2.2 lbs
Dimensions 5 × 4 × 4 in