RACE SERIES 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. |
 |
| 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 |
 |
| LS-1 / LS-2 (LS-6 Head) Small Block Chevy |
|
| 11361-8 |
Exh. |
1.550" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
87 |
|
| 11363-8 |
Exh. |
1.575" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
89 |
|
| 11365-8 |
Exh. |
1.600" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
91 |
|
| 11360-8 |
Int. |
2.000" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
103 |
|
| 11360H-8 |
Int. |
2.000" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
91 |
|
| 11362-8 |
Int. |
2.020" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
105 |
|
| 11362H-8 |
Int. |
2.020" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
93 |
|
| 11390-8 |
Int. |
2.055" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
106 |
|
| 11390H-8 |
Int. |
2.055" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
94 |
|
| 11398-8 |
Int. |
2.080" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
107 |
|
| 11398H-8 |
Int. |
2.080" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
95 |
|
| 11350-8 |
Int. |
2.100" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
109 |
|
| 11350H-8 |
Int. |
2.100" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
97 |
|
| LS-3 / L-99 (L-92 Head) Small Block Chevy |
|
| 11621-8 |
Exh. |
1.590" |
.3136" |
Stock |
4.923" |
.160" |
25° x 7/16" |
.070" |
.115" |
18° Dish |
92 |
|
| 11620-8 |
Int. |
2.165" |
.3133" |
Stock |
4.900" |
.160" |
Pro Flo: 12° x 3/8" |
.055" |
.100" |
7° Dish |
119 |
|
| 11620H-8 |
Int. |
2.165" |
.3133" |
Stock |
4.900" |
.160" |
Pro Flo: 12° x 3/8" |
.055" |
.100" |
7° Dish |
107 |
|
| H suffix indicates hollow stem |
|
PRO FLO SEVERE DUTY 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 Severe Duty 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 Severe Duty material, the best available, and are the Pro Flo design 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 |
|
| LS-1 / LS-2 (LS-6 Head) Small Block Chevy - Severe Duty |
|
| 11673-8 |
Exh. |
1.550" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
88 |
|
| 11675-8 |
Exh. |
1.575" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
90 |
|
| 11677-8 |
Exh. |
1.600" |
.3136" |
Stock |
4.923" |
.175" |
25° x 7/16" |
.065" |
.115" |
18° Dish |
92 |
|
| 11680-8 |
Int. |
2.055" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo:12° X 3/8" |
.050" |
.095" |
7° Dish |
107 |
|
| 11680H-8 |
Int. |
2.055" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
95 |
|
| 11682-8 |
Int. |
2.080" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo:12° X 3/8" |
.050" |
.095" |
7° Dish |
108 |
|
| 11682H-8 |
Int. |
2.080" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
96 |
|
| 11684-8 |
Int. |
2.100" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo:12° X 3/8" |
.050" |
.095" |
7° Dish |
110 |
|
| 11684H-8 |
Int. |
2.100" |
.3133" |
Stock |
4.874" |
.175" |
Pro Flo: 12° x 3/8" |
.050" |
.095" |
7° Dish |
98 |
|
| LS-1 / LS-2 (LS-6 Head) Small Block Chevy - Extreme Duty |
|
| 11681-8 |
Exh. |
1.575" |
.3136" |
Stock |
4.923" |
.175" |
25° X 7/16" |
.065" |
.115" |
18° Dish |
90 |
|
| 11683-8 |
Exh. |
1.600" |
.3136" |
Stock |
4.923" |
.175" |
25° X 7/16" |
.065" |
.115" |
18° Dish |
92 |
|
| LS-3/L-99 (L-92 Head) Small Block Chevy - Severe Duty |
|
| 11661-8 |
Exh. |
1.590" |
.3136" |
Stock |
4.923" |
.160" |
25° x 7/16" |
.070" |
.115" |
18° Dish |
94 |
|
| 11686-8 |
Int. |
2.165" |
.3133" |
Stock |
4.900" |
.160" |
Pro Flo:12° X 3/8" |
.055" |
.100" |
7° Dish |
118 |
|
| 11686H-8 |
Int. |
2.165" |
.3133" |
Stock |
4.900" |
.160" |
Pro Flo:12° X 3/8" |
.055" |
.100" |
7° Dish |
109 |
|
| LS-3/L-99 (L-92 Head) Small Block Chevy - Extreme Duty |
|
| 11685-8 |
Exh. |
1.590" |
.3136" |
Stock |
4.923" |
.160" |
25° X 7/16" |
.070" |
.115" |
18° Dish |
93 |
|
| LS-7 Small Block Chevy - Severe Duty |
|
| 11679-8 |
Exh. |
1.610" |
.3136" |
Stock |
5.230" |
.290" |
25° x 7/16" |
.075" |
.100" |
18° Dish |
103 |
|
| 11688-8 |
Int. |
2.205" |
.3133" |
Stock |
5.200" |
.300" |
Pro Flo: 12° x 3/8" |
.050" |
.085" |
7° Dish |
120 |
|
| 11688H-8 |
Int. |
2.205" |
.3133" |
Stock |
5.200" |
.300" |
Pro Flo: 12° x 3/8" |
.050" |
.085" |
7° Dish |
110 |
|
| LS-7 Small Block Chevy - Extreme Duty |
|
| 11687-8 |
Exh. |
1.610" |
.3136" |
Stock |
5.230" |
.290" |
25° X 7/16" |
.075" |
.100" |
18° Dish |
103 |
|
| H suffix indicates hollow stem |
|
|
