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.Head Gasket Volumes
YOU WILL FIND THIS INFORMATION HANDY FOR CALCULATING COMPRESSION RATIOS.
|
ALL BIG TWIN ENGINES |
Application |
Thickness |
Gasket Bore |
Volume |
|
Evo stock cylinder |
.032” |
3.600” |
5.3 CC’s |
|
|
“ |
.045” |
3.600” |
7.5 CC’s |
|
|
“ |
.062” |
3.600” |
10.3 CC’s |
|
|
S&S 3-5/8 bore |
.045” |
3.680” |
7.8 CC’s |
|
|
“ |
.062” |
3.680” |
10.8 CC’s |
|
|
S&S 4” bore |
.045” |
4.0” |
9.3 CC’s |
|
|
Twin Cam 88 |
.052”: |
3.850” |
9.9 CC’s |
|
|
“ |
.052”-.020” spin drop |
3.850” |
6.1 CC’s |
|
|
TC 95 3.875” bore |
.052” |
3.95” |
10.4 CC’s |
|
|
“ |
.052”-.020” spin drop |
3.95” |
6.4 CC’s |
|