Abstract geometric ball bearing, valvetrain precision
EPChunMi · Engine parts · Since 1999

Valvetrain parts that keep their clearance — built to OE spec, stocked for dispatch.

Rocker arm and lifter kits, MDS and AFM lifters, camshafts and pushrods for the engines that fill American roads — cold-forged, ground and hardened, measured against the OEM print.

Why EPChunMi

Four reasons buyers come back.

Selection, price, delivery and support — answered before the first purchase order.

01 / SELECTION

Largest selection, value pricing

Nine product families in one catalogue, priced for repeat orders rather than brand markup.

02 / FACTORY

IATF 16949 certified factory

Cold forging, CNC grinding and controlled heat treatment, audited to the automotive standard.

03 / DELIVERY

Free shipping on most items

Fast-moving part numbers are held in stock and dispatched the same or next business day.

04 / SUPPORT

Technical support that answers

Fitment read against engine codes before the sale, and for the whole warranty period after it.

Built to OE spec

One chain of custody, blank to boxed kit.

A lifter that ticks at 6,000 rpm was decided long before it was installed. Blank, grind, hardening and measurement happen in one sequence, so nothing is lost between suppliers.

Cam profile · lift curve · tolerance
01

Drawing & DFM

Send a drawing, a sample or a worn part. We tool from what already works in the engine.

02

Cold forging

Blanks formed close to final shape, grain flow kept where the load goes.

03

CNC machining

Turning, milling and cam grinding on high-precision lines.

04

Heat treatment

Case hardness and core toughness set per print, then verified per lot.

05

Metrology

Dimensions checked against the OEM drawing, not a catalogue guess.

06

100% inspection

Every kit inspected before it is boxed and released to stock.

Products

Four families we lead with.

High-precision valvetrain parts, kitted for the job. Every part number below ships from stock, with fitment checked against your engine code before it leaves.

CamshaftGround camshaft with hardened lobe profiles, isolated on a transparent background
01 — Valvetrain

Camshafts

Lobe profiles ground and hardened, journals held to print.

Exhaust and intake camshafts for LTG 2.0L (12626901, 2013–2023) and other high-volume families. Profiles are cut, ground and hardened, then journals are finished and checked for lift, phasing and diameter.

Cam grinding12626901Lobe hardnessJournal tolerance
See camshafts on Amazon
Valve liftersSet of hydraulic roller lifters standing in two rows, isolated on a transparent background
02 — Valvetrain

MDS & AFM lifters

The part that decides whether the engine is quiet.

Sixteen-piece MDS lifter sets for 5.7L HEMI (2005–2021) and AFM / roller lifter sets for GM 4.3L to 6.2L. Cold-forged bodies raise stem strength and wear resistance exactly where the camshaft loads them hardest.

Cold-forgedMDS 53021726AEAFM 1256925616-piece sets
See the lifters on Amazon
Rocker armSingle roller rocker arm with polished roller and ball socket, isolated on a transparent background
03 — Valvetrain

Rocker arm & lifter kits

Twelve pieces, one box, one torque spec.

Complete rocker arm and lifter sets for Pentastar 3.6L and 3.2L (2011–2021), plus the 8C3Z-6564-D rocker arm assembly for Ford 6.4L Power Stroke. Each kit matches OE dimension, form and function, and is inspected before it is packed.

12-piece kits5184296AH8C3Z-6564-DOE dimensions
See the kits on Amazon
Pushrods & locksPushrods with polished ball ends and poly lock nuts, isolated on a transparent background
04 — Valvetrain

Pushrods, followers & poly locks

The small hardware that keeps the geometry honest.

Poly locks for 3/8 stud roller rockers, followers and pushrods for aluminium rocker setups. Studs are precision ground to limit deflection, with a taper that holds torque in the locking zone.

3/8 studPoly locksFollowersPrecision ground
See hardware on Amazon
Also stocked
  • Belt tensioner kits
  • Bearings
  • Engine air filters
  • Service hardware

Filters, tensioners and bearings run alongside the valvetrain line, so a service job can be covered on one purchase order. If a part number is not visible, ask — it is often already in stock.

Pleated engine air filter panel, isolated on a transparent background
The shelf

Numbers a buyer can check.

1999
Trading as an engine parts brand since
9
Product families on the storefront
IATF
16949 : 2016 certified factory
ISO
9001 quality management system
Free
Shipping on most items
1yr
Warranty on every kit
Millions
Customers served worldwide
OE
Reference numbers cross-checked
Stock
Dispatch on fast-moving part numbers

Rocker arms · lifters · camshafts · pushrods · followers · poly locks · tensioner kits · bearings · air filters

Quality

Quality is a gate, not a department.

Systems and habits a buyer can verify before the first order — and a paper trail that travels with the parts afterwards.

Vernier caliper measuring a machined valvetrain component
01

Dimensional

Measured against the OEM drawing, not against a competitor's part.

02

Hardness

Case depth and surface hardness verified per heat lot before release.

03

Material

Alloy grade and certificates retained with the production record.

  • 100% inspection before packing
  • Fitment cross-checked against OEM reference numbers
  • One-year warranty on every kit
  • Technical support that reads engine codes
  • Free shipping on most items
  • Stock dispatch on fast-moving part numbers
Contact

Talk to a parts specialist.

Order direct on the Amazon store, or send your fitment list for wholesale and OEM programmes.

sy200706@163.com
Storefront
EPChunMi Engineparts Since 1999Official Amazon store · orders, returns and reviews
Wholesale
Wholesale and OEM enquiriesSend engine code, OEM reference, quantity and destination
Fitment
VIN or engine codeCross-checked against the reference numbers before you order · one business day
Dispatch
Free shipping on most itemsFast-moving part numbers ship from stock · one-year warranty