COME Racing 2009 VN-VT Holden alloy heads 
NEW! The latest version of our ever popular alloy heads for Holden V8 engines is now available.
1) NEW! Redesigned combustion chambers for maximum swirl and burn efficiency.
2) NEW! Spark plug moved for maximum burn while still working with production extractors.
3) Stellite interlocking valve seats for use with any fuels.
4) NEW! solid phosphor bronze valve guides for maximum strength and service life.
5) NEW! increased amount of solid alloy material in water cores for maximum porting potential, feasibility to deepen and widen spring seats for any available roller or flat tappet springs. More material in decks, intake and exhaust faces for incredible strength under extreme loads.
6) NEW! redesigned intake and exhaust ports for maximum airflow with increased velocity. Low, mid and high lift flows improved by over 10% in most areas. Intake port volume kept to a small high velocity 183cc size for vastly improved torque and engine acceleration potential.
7) NEW! these are truly the first and only Holden V8 alloy heads designed to be used right out of the box with absolutely NO porting whatsoever. With a proper valve job only, the intakes flow over 545 bhp @.500" valve lift, over 570 bhp @ .600" lift and over 588 bhp @.700" lift with a small 2.02" non undercut intake valve. This is with no bowl blending or porting whatsoever.
8) NEW! race potential without porting never before seen. Throat the installed intake seats to a 2.08" valve size with a proper valve job and very minor bowls blending to one centimeter below the bottom seat and the same small 183cc intake runners flow over 630 bhp @.700" valve lift with still incredibly strong low to mid lift flow numbers.
This latest technology street/strip head from COME Racing will outpower and out accelerate anything else on the market. By the way, get in there with the right porting and you will see awesome flow numbers for race only applications. However, we strongly suggest if you are building a great street/strip engine that you forget about the porting altogether, you simply won't need it. Opening the port volume further by porting the heads will see flow gains but only at the upper valve lifts suitable for race only applications.
Keeping the volumes smaller keeps the air speed or velocity very high and promotes incredible torque curves and throttle response while enabling huge power gains with the right combinations. Heads as before are available bare with only guides and seats installed for $2750.00 per pair. Or as a complete package including our 2.02" intake and 1.60" stainless intake and exhaust valves, full valve job to maximise air flow potential, dual coil flat tappet or hydraulic roller application 1.450" springs and chrome moly steel retainers on hardened steel spring locators to protect the alloy spring pockets, positive valve stem seals and gasket faces finish machined to approximately 62cc equalised volumes. Other chamber volumes also available. The complete 2009 head package is still only $3500.00 per pair fully assembled.
To complete your engine we now have finally released our beautiful new cast alloy non leak valve covers to really complete any Holden V8 engine. These are $550.00 per pair and feature 4 bolt fastening with capscrew bolts (supplied), oil filler cap, baffle plates for PCV or breather vent raw oil restriction and are drilled and tapped for front mount right angle breather fittings (supplied) to accept hoses like the OEM VN factory design. You have the choice of a fully clearanced cover to clear the VN-VT Commodore brake booster on the drivers side cover or to buy the covers without the special clearanced Commodore version for a more uniform look in all other model cars where symmetrical appearance is more important.
Kit deals...
1) Holden V8 alloy head package deals... latest design 2009 heads complete volume needs heads are $3500.00 per pair complete. NOTE: these heads flow over 588hp through intake ports. OR...The above heads and our Holden EFI Twin Throttle Body EFI intake manifold purchased together for $5500.00
2) ECOTEC or VN-VR V6 4.2 Stroker kits...BOOST application kits with the absolute strongest parts available anywhere for the Holden V6 engines. These balanced kits feature our 4340 steel billet stroker cranks, our 4340 steel "H" beam rods with ARP2000 series bolts and either Wiseco or Diamond Racing custom forged pistons, moly rings, rod and main bearings all for $5000.00 (same kit with cast crank for $4000.00) Get that V6 ready for the track with V8 humbling power and reliability.
3) 355ci Holden V8 Stroker kit, billet steel crank, “H” beam rods, forged pistons. Available in normally aspirated or boost style low compression pistons…$4900.00
5) 383ci Holden V8 Stroker kit, billet steel crank, “H” beam rods, forged pistons. Available in normally aspirated or boost style low compression pistons…$4900.00
6) 396ci Holden V8 Stroker kit, nodular cast iron 3.8750" stroker crank, "I" beam 5.850" fully floating 4340 steel rods, custom forged pistons (several compression ratios available), fully internal balanced, moly rings, rod and main bearings all supplied...$3300.00 full kit
Bargain deal...With every set of our complete 2009 VN style Holden V8 alloy heads...when ordered together with either our 355ci or 383ci Stroker kits you will receive FORGED PISTONS FREE! The deal means you receive our complete pair of alloy heads, a 355 Stroker kit with nodular cast crank, forged 4340 steel "I" beam rods and forged pistons all for $5500.00 The same deal with our 383ci Stroker kit is $6000.00 By far the best quality Holden V8 products at the best prices.
396ci project version # 1 nears completion...Our first 396ci Holden V8 project engine will be ready soon. Fitted with our latest 396 stroker kit and new 2009 version alloy heads. This will give you all a baseline formula for a street engine with great manners, life potential and even fuel economy that will run low 11's to high 10's on pump fuel in a typical late model VB-VS Commodore. Quicker times for the lighter models but still pretty insane performance from a reliable long life engine anyone can build with our bolt together components.
For more details on all our products including turn key engines, stroker cranks and kits, heads, intake manifolds etc. call during business hours (03)9571-4204 or email us at come@comeracing.com All trade enquiries email to workshop@comeracing.com
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