RACE MASTER VALVES / EXTREME DUTY VALVES - learn more about our valves
Manley valves have set the standard for excellence in quality, material and design in the performance world for four decades. Manufactured from our proven Race Master and XtremeAlloy materials providing the ultimate in strength and durability. Manley valves feature chrome stems, hard tips, fully machined surfaces and swirl polished radii. The intakes utilize our Race Master material and are designed for maximum air flow. The Extreme Duty exhausts are made from our top of the line XtremeAlloy exhaust material, the best in the market making it ideally suited for forced induction and nitrous applications. |
 |
| Part No. |
Type |
Head Diameter |
Stem Diameter |
Installed Height |
O/A Length |
Tip Length |
Underhead Angle/Radius |
Margin |
Seat Width |
Top of Head |
Wgt/Grams |
 |
| RACE MASTER VALVES w/ TRIPLE GROOVE |
|
| 11623-8 |
Exh. |
31mm |
.2345 |
Stock |
4.274 |
.305 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
44 |
|
| 11625-8 |
Exh. |
31.5 mm |
.2345 |
Stock |
4.274 |
.305 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
45 |
|
| 11627-8 |
Exh. |
32 mm |
.2345 |
Stock |
4.274 |
.305 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
46 |
|
| EXTREME DUTY VALVES w/ TRIPLE GROOVE |
|
| 12623-8 |
Exh. |
31mm |
.2345 |
Stock |
4.274 |
.305 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
46 |
|
| 12625-8 |
Exh. |
31.5 mm |
.2345 |
Stock |
4.274 |
.305 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
47 |
|
| 12627-8 |
Exh. |
32 mm |
.2345 |
Stock |
4.274 |
.305 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
48 |
|
| RACE MASTER VALVES w/ TRIPLE GROOVE |
|
| 11622-8* |
Int. |
37mm |
.2355 |
Stock |
4.722 |
.365 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
54 |
|
| 11624-8* |
Int. |
37.5mm |
.2355 |
Stock |
4.722 |
.365 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
55 |
|
| 11626-8* |
Int. |
38mm |
.2355 |
Stock |
4.722 |
.365 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
56 |
|
| RACE MASTER VALVES w/ BEAD LOCŪ GROOVE |
|
| 11623B-8 |
Exh. |
31mm |
.2345 |
Stock |
4.274 |
.320 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
44 |
|
| 11625B-8 |
Exh. |
31.5 mm |
.2345 |
Stock |
4.274 |
.320 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
45 |
|
| 11627B-8 |
Exh. |
32 mm |
.2345 |
Stock |
4.274 |
.320 |
30° x 11/32" |
.050 |
.080 |
25° Dish |
46 |
|
| EXTREME DUTY VALVES w/ BEAD LOCŪ GROOVE |
|
| 12623B-8 |
Exh. |
31mm |
.2345 |
Stock |
4.274 |
.320 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
46 |
|
| 12625B-8 |
Exh. |
31.5 mm |
.2345 |
Stock |
4.274 |
.320 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
47 |
|
| 12627B-8 |
Exh. |
32 mm |
.2345 |
Stock |
4.274 |
.320 |
25° x 11/32" |
.050 |
.080 |
20° Dish |
48 |
|
| RACE MASTER VALVES w/ BEAD LOCŪ GROOVE |
|
| 11622B-8* |
Int. |
37mm |
.2355 |
Stock |
4.722 |
.380 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
54 |
|
| 11624B-8* |
Int. |
37.5mm |
.2355 |
Stock |
4.722 |
.380 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
55 |
|
| 11626B-8* |
Int. |
38mm |
.2355 |
Stock |
4.722 |
.380 |
10° x 5/16" |
.045 |
.080 |
5° Dish |
56 |
|
| * Intakes have backcut - .050" x 30° |
|
