What is Head-Quarters USA?
Head-Quarters began in 1969 with Doug Coffey and a vision. Since then, the demand for Doug's special blend of high performance and dependibility has been overwhelming. Head-Quarters USA was established in order to better serve the needs of retail customers in the US. Nothing else has changed...same great products by the same great company. Welcome to Head-Quarters USA.
**You can now check pricing and buy online. Click Products and Services to the left.**
We never sacrifice dependability and drivability for performance and to prove it, the 5 of us gathered in Dallas, TX for 10 days of riding and putting the HQ Big Motors to the test. Starting and 80 F, the route took us from 100 F temps at sea level to 28 F at over 8000 ft using 87-93 octane...through mountains and across barren desert. Major cities: Atlanta GA, Dallas TX, El Paso, TX, Phoenix AZ, Flagstaff AZ, Amarilo TX and back to the east coast.
DESCRIPTION: HQ BLACK OPS LIFTERS - SOLD AS SET OF 4
PART NUMBER: HQ-4225-04 For those that demand the best! Through design and extensive development by HQ, these lifters are manufactured to exacting standards. Each lifter is tested for bleed down and matched as a set of four. As RPMs, temperature, and cam size increase, lifters can bleed down causing lash in the pushrod. Not only do the Black Ops bleed down slow, but the recovery rate is lightning fast offering quieter valvetrains and more accurate cam timing/lift. Due to extended manufacturing time and high demand, these are available in limited quantities.
DESCRIPTION: HQ PRO ROLLER ROCKER ARMS
PART NUMBER: HQ-4600 Head Quarters Pro Forged Roller Rocker Arms are forged from 4140 steel and CNC machined for a perfect fit. Each rocker arm includes solid bronze bushings for extended life, and roller tips that reduce operating friction. Head Quarters Pro Roller Rocker Arms fit all Evo-style, Big Twin, Sportster, and Twin Cam engines. Sold in sets of four.
DESCRIPTION: 113" SPORT KIT
PART NUMBER: HQB-113-S
We think the 113 motor might just be one of the best all around combinations available for the Twin Cam motor. Our package uses a set of 4.060” bigger bore cylinders and will require a 4-3/8” stroke crank (stock on 2007 models) along with a set of Head Quarters HVP cylinder heads and cams.
The increased stroke provides better mechanical advantage through rod leverage and the results are higher torque figures at a lower RPM. With stock bore carb or throttle body, 2,000 RPM cruising is possible with plenty of power on tap through the whole mid-range. If you want that 454 big block in a Camaro feeling when you turn the throttle, this is the way to go.
Special Notice
ATTN DEALERS AND NON-US BASED CUSTOMERS
There has been a bit of confusion in regards to pricing and shopping carts. This site is intended to be used by US Retail customers. If you are a dealer or live outside the US and wish to place an order, contact Head Quarters main office. Pricing reflected on this site is retail in USD. Thank you.Contact Head Quarters Canada 
Click Here
2008 Head Quarters Power Tour
OVER 5000 MILES IN 10 DAYS
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View the photo Slideshow Click Here
Design you build online
CLICK PRODUCTS AND SERVICE TO THE LEFT
Doug has put this program together to help you choose, on your time, the build that's perfect for you. Once you select your year and model, you will be directed to a page that offers detailed descriptions of each of the 4 package categories. Simply pick the one that best describes your riding style. You can be confident that Doug's experience is built right in and your package will be made to order. Build as many kits as you like, add items to the shopping cart for pricing...you are not committed to buy unless you checkout.Build Yours Now Click Here
Head-Quarters ProTuner EFI Fuel System Controller
NOW AVAILABLE!
Designed to be used in conjunction with the Screamin Eagle Race Tuner or Power Commander and your stock ECM. Automatically manages your fuel system by converting it to a full closed loop system. No complicated programming or dyno time required!More Info Click Here
Featured Products
THE LATEST ITEMS AVAILABLE FROM HEAD-QUARTERS
DESCRIPTION: HQ BLACK OPS LIFTERS - SOLD AS SET OF 4
PART NUMBER: HQ-4225-04 For those that demand the best! Through design and extensive development by HQ, these lifters are manufactured to exacting standards. Each lifter is tested for bleed down and matched as a set of four. As RPMs, temperature, and cam size increase, lifters can bleed down causing lash in the pushrod. Not only do the Black Ops bleed down slow, but the recovery rate is lightning fast offering quieter valvetrains and more accurate cam timing/lift. Due to extended manufacturing time and high demand, these are available in limited quantities.
DESCRIPTION: HQ PRO ROLLER ROCKER ARMS
PART NUMBER: HQ-4600 Head Quarters Pro Forged Roller Rocker Arms are forged from 4140 steel and CNC machined for a perfect fit. Each rocker arm includes solid bronze bushings for extended life, and roller tips that reduce operating friction. Head Quarters Pro Roller Rocker Arms fit all Evo-style, Big Twin, Sportster, and Twin Cam engines. Sold in sets of four.
DESCRIPTION: 113" SPORT KIT
PART NUMBER: HQB-113-S
We think the 113 motor might just be one of the best all around combinations available for the Twin Cam motor. Our package uses a set of 4.060” bigger bore cylinders and will require a 4-3/8” stroke crank (stock on 2007 models) along with a set of Head Quarters HVP cylinder heads and cams.
The increased stroke provides better mechanical advantage through rod leverage and the results are higher torque figures at a lower RPM. With stock bore carb or throttle body, 2,000 RPM cruising is possible with plenty of power on tap through the whole mid-range. If you want that 454 big block in a Camaro feeling when you turn the throttle, this is the way to go.
More Options Available Click Here