RACE SERIES 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 proven Race Master materials, Manley valves feature chrome stems, hard tips, fully machined surfaces and swirl polished radii. Many applications are Pro Flow design for maximum air flow. For 3V engines, XtremeAlloy exhaust material comes standard. |
 |
| |
| RACE MASTER VALVES (2 VALVE) |
| 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 |
 |
| 1999 and Later PI Cylinder Head |
|
| 11637-8 |
Exh. |
36.0 mm |
.2740" |
Stock |
4.650" |
.470" |
15° x 1/2" |
.060" |
.080" |
9° Dish |
66 |
|
|
| 11639-8 |
Exh. |
37.0 mm |
.2740" |
Stock |
4.650" |
.470" |
15° x 1/2" |
.060" |
.080" |
9° Dish |
68 |
|
|
| 11636-8 |
Int. |
44.5 mm |
.2750" |
Stock |
4.705" |
.470" |
10° x 3/8" |
.050" |
.080" |
5° Dish |
76 |
|
|
| 11640-8 |
Int. |
45.5 mm |
.2750" |
Stock |
4.705" |
.470" |
10° x 3/8" |
.050" |
.080" |
5° Dish |
78 |
|
|
| 1996-1998 |
|
| 11635-8 |
Exh. |
34.0 mm |
.2740" |
Stock |
4.650" |
.470" |
15° x 1/2" |
.060" |
.080" |
9° Dish |
62 |
|
|
| 11637-8* |
Exh. |
36.0 mm |
.2740" |
Stock |
4.650" |
.470" |
15° x 1/2" |
.060" |
.080" |
9° Dish |
66 |
|
|
| 11634-8 |
Int. |
44.5 mm |
.2750" |
Stock |
4.630" |
.470" |
10° x 3/8" |
.050" |
.080" |
5° Dish |
77 |
|
|
| 11638-8* |
Int. |
46.83 mm |
.2750" |
Stock |
4.630" |
.470" |
10° x 3/8" |
.050" |
.080" |
5° Dish |
82 |
|
|
| *Part numbers 11637-8 and 11638-8 are for the Ford Racing M-6049-D46 cylinder head. |
|
| |
| RACE MASTER VALVES & EXTREME DUTY VALVES (3 VALVE) |
|
| 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 |
|
| 11631-8 |
Exh. |
37.5 mm |
.2345" |
Stock |
4.585" |
.380" |
25° x 11/32" |
.080" |
.100" |
20° Dish |
68 |
|
|
| 11633-8 |
Exh. |
38.5 mm |
.2345" |
Stock |
4.585" |
.380" |
25° x 11/32" |
.080" |
.100" |
20° Dish |
70 |
|
|
| 11630-8 |
Int. |
34 mm |
.2355" |
Stock |
4.620" |
.315" |
12° x 5/16" |
.065" |
.100" |
7° Dish |
53 |
|
|
| 11632-8 |
Int. |
35 mm |
.2355" |
Stock |
4.620" |
.315" |
12° x 5/16" |
.065" |
.100" |
7° Dish |
55 |
|
|
| |
| RACE MASTER VALVES (4 VALVE) |
|
| 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 |
|
| 11615-8 |
Exh. |
30 mm |
.2740" |
Stock |
4.587" |
.425" |
15° x 1/2" |
.050" |
.080" |
9° Dish |
53 |
|
|
| 11617-8 |
Exh. |
31 mm |
.2740" |
Stock |
4.587" |
.425" |
15° x 1/2" |
.050" |
.080" |
9° Dish |
55 |
|
|
| 11616-8 |
Int. |
37 mm |
.2750" |
Stock |
5.339" |
.620" |
10° x 3/8" |
.045" |
.080" |
5° Dish |
68 |
|
|
| 11618-8 |
Int. |
38 mm |
.2750" |
Stock |
5.339" |
.620" |
10° x 3/8" |
.045" |
.080" |
5° Dish |
70 |
|
|
