All VAC cylinder head services are performed on existing customer cores. This requires the customer's core to be supplied to VAC for servicing.
If you do not have a core, then contact our sales team at Sales@VACmotorsports.com to have one sourced.
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Stage 1
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Stage 2
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Stage 3
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CNC 5-Axis Porting
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NO
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NO
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YES
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Performance Valves
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NO
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NO
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YES
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Performance Springs
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NO
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YES
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YES
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Performance Retainers
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NO
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YES
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YES
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Valve Guides*
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YES
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YES
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YES
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Valve Seals
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YES
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YES
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YES
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Multi Angle Valve Job
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YES
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YES
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YES
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Resurfaced Mating Surface
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YES
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YES
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YES
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Complete Assembly
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YES
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YES
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YES
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*Includes Valve Guide Labor Costs. If new Valve Guides are required, then an additional charge will be added.
VAC's Stage 1 Performance Cylinder Heads are always a popular choice when rebuilding an engine and a fantastic value in performance.
When considering the reconditioned cylinder head options we offer; Stage 1 offers performance gains at only a slightly higher price. Best of all, our Stage 1 heads are still Stock Class legal. A great choice for any vehicle.
Our Stage One Cylinder Heads feature the following:
Complete Disassembly & Cleaning
Comprehensive Leak, Crack & Pressure Test
Inspect All Components For Irregular Wear
Our High performance Multi Angle Valve Job using Serdi Equipment
All New VAC Uprated Valve Guides
Viton Valve Seals
Reconditioning & Blueprinting of Your Valves
Balancing of Your OE Springs
Trueness Checked & Resurfaced Mating Surface
Unshrouding of Valves
Attention to Potential Hot-spot Areas and Chamfering
Stage 2 heads have years in the field and have been fine tuned over the years to fully enhance the torque band and mid to top-end power. Compatible with all other cylinder head upgrades as well as forced induction.
Our Stage 2 Cylinder Heads feature the following:
Complete Disassembly & Cleaning
Comprehensive Leak, Crack & Pressure Test
Inspect All Components For Irregular Wear
Our Superior Max Performance Multi-angle Intake, Radius Exhaust Valve Job Using Serdi Equipment
Unshrouding of Valves
Attention to Potential Hot-spot Areas and Chamfering
All New VAC Uprated Valve Guides
Reconditioning & Blueprinting of Your Valves
Trueness Checked & Resurfaced Mating Surface
VAC High Performance Valve Springs, Balanced
VAC Performance Steel Alloy Retainers (Titanium available On Request )
VAC's Stage 3 Performance Cylinder Heads are the ULTIMATE in cylinder head technology and performance, crafted with more than 50+ years experience in the racing field.
Many of our cylinder heads are capable of 120-155 HP per liter N/A, and of course drastically more when used with forced induction. We have spent many, many years on the dyno, the flow bench, and even more years though world-wide racing experience to achieve such excellent results while being reliable enough to compete in professional motorsports. Our Stage 3 heads are intended to produce maximum peak horsepower while still maintaining excellent powerband, the crucial secret of the fastest race engines in the world!
Even though they are an extreme departure from stock, we have stage 3 heads for use on the ultimate street performance vehicle as well.
Our Stage 3 Cylinder Heads feature the following:
Complete Disassembly & Cleaning
Comprehensive Leak, Crack & Pressure Test
Inspect All Components For Irregular Wear
Our Superior Max Performance Multi-angle Intake, Radius Exhaust Valve Job Using Serdi Equipment
One-Piece High Performance Stainless Steel Valves, Balanced and Blueprinted (Standard or Oversized)
Unshrouding of Valves
Meticulous Port and Polish Work
Attention to Potential Hot-spot Areas and Chamfering
CC'ed and Chamber Reprofiling as Needed
All New VAC Up rated Valve Guides
Trueness Checked & Resurfaced Mating Surface
High Performance VAC Valve Springs, Balanced
Titanium Or Steel Alloy Valve Spring Retainers
Proprietary Tweaks to Improve Performance
Everything above is a Flow-Bench and real world tested design
Requirements:
A Core cylinder head is required for all head work, please call or email if you will no be supplying us with a head for updated core market price.
This price does not include installation of camshaft/s. Please request if required, additional charge of $99-179.
VAC Tech Tip:
Cleaning up the path of the intake and exhaust around the valves as well as a multi-angle valve job net power gains with no drawbacks! Every engine rebuild can benefit from this addition.