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  1. Mace Engineering Group
  2. ENGINE & COMPONENTS
  3. Roller Rockers & Covers

Roller Rockers & Covers

  • How much lift would these rocker arms "HIGH RATIO ROCKER & PUSHROD KIT FOR HOLDEN COMMODORE VU VY ECOTEC L36 3.8L V6"  add to the camshaft? 
  • Is it only half we buying or is it both sides of the block?
  • I recently purchased some 1.98 ratio rockers for my Holden VU II Storm and now the engine has a constant ticking sound, these where installed by a licensed mechanic as well and are fitted 100% correctly, are you aware of what may cause this sound, also th
  • Hi there, do HOLDEN HIGH RATIO ROLLER ROCKERS TO SUIT BUICK 3800 V6 fit with standard valve covers?
  • I am interested in your Rocker Arms (1.9) for my 2001 lq4 engine (6.0) with 2006 Corvette camshaft and twin turbo set-up....Lowboost....around 12 lbs max....I was wondering if you feel that your rocker arms will be strong enough to handle this set-up
  • how do i choose which rockers to use between the high and ultra high?
  • should i just scrap the spacers and get the high ratio roller rockers?
  • What is the length of your rocker bolts to suit ECOTEC V6 & L67 (BPROC601)
  • The MACE RE-USABLE ROCKER BOLTS TO SUIT ECOTEC V6 & L67  are these the same as a 8.8 grade bolt?
  • Do you need the new PCM/memcal if you install high ratio roller rockers and lifters to suit ECOTEC AND L67 V6?
  • Do you have Rockers covers to suit Buick
  • Can I use Ultra high ratio roller rockers (1.98:1) to suit ECOTEC AND L67 V6 in a VY V6?
  • What are the benefits of PERF HIGH RATIO ROLLER ROCKERS HOLDEN VS VU VT VX VY ECOTEC L36 L67 SC 3.8 V6?
  • What is the difference between the MACE high ratio roller rockers and the standard one
  • What is the material of MACE ROCKER COVER GASKET KIT TO SUIT MAZDA B2600 BRAVO UF UN G6 2.6L I4?
  • What is the length of your rocker bolts to suit ECOTEC V6 & L67 (BPROC601)?
  • Are the rocker covers and gaskets you supply a direct bolt on option? Can the old rocker cover bolts and rubber bolts seals be still used without the requirement of any other parts?
  • Will I Need New Push Rods?
  • Can I Use The 'Comp Cam Re-Usable Rocker Bolts' On A standard Engine With Standard/High Ratio Rockers As Replacements For The Factory Items?
  • Can Your Aluminium Rocker Covers Be Drilled And Have Fittings Welded On Without Damage For An Oil Catch Can?
  • Do The Aluminium Rocker Covers Come With New Gaskets?
  • Which vehicles do the Polished Aluminium Rocker Covers fit and do they require modification?
  • Do Higher Ratio Rockers, Cams or a Sports Exhaust Lower Boost On A Supercharged Engine?
  • Do I Need To Replace Or Upgrade My Valve Springs?
  • Do I Need To Upgrade The Pushrods With The High Ratio Rockers?
  • Which Rockers Will Be Best In My V6 Ecotec Commodore?
  • Why Are The Ultra High Rockers Not Suited To VYs?
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