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.

	Stage 1	Stage 2	Stage 3
CNC 5-Axis Porting	NO	NO	YES
Performance Valves	NO	NO	YES
Performance Springs	NO	YES	YES
Performance Retainers	NO	YES	YES
Valve Guides - Labor Only*	YES	YES	YES
Valve Seals	YES	YES	YES
Multi Angle Valve Job	YES	YES	YES
Resurfaced Mating Surface	YES	YES	YES
Complete Assembly	YES	YES	YES

*Reflects included 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

Truenes 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.

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.