Race Flo Valves Race Flo Valves have been necked down in the port area to enhance flow. Exhaust valves are XH-426 stainless steel while intake valves are NK-842 stainless steel. Valve stems are fully chromed with hardened tips. Valves are swirl polished, fully machined. “Pro-Flo” under head design also offers improved flow char- acteristics. Sold in sets of eight. Also available individually (to order, replace the -8 with a -1 at end of part number).
Manley, an acknowledged leader in performance and racing valves, offers a full selection of quality valves for most popular applications in three categories, Race Master/Race Flo, Severe Duty/Severe Duty Pro Flo and Extreme Duty.
Race Master Valves Manley’s Race Master Valves have straight, fully chromed stems, hardened tips and are thoroughly machined and swirl polished. Intake valves are made of NK-842 stainless steel and exhaust valves are XH-426 stainless steel. Sold in sets of eight. Also available individually. To order, replace the -8 with a -1 at end of part number.
Installed Height
Part No.
Type
Size
Stem
Small Block Chevrolet 262-400 MAN11521-8 Exhaust
1.500" 1.560" 1.600" 1.600" 1.940" 2.000" 2.020" 2.020" 2.055" 2.055" 2.080" 1.880" 2.065" 2.190" 2.250"
.3415" .3415" .3415" .3415" .3415" .3415" .3415" .3415" .3415" .3415" .3415" .3715" .3715" .3715" .3715"
Stock Stock Stock Stock Stock Stock
MAN11501-8 MAN11565-8 MAN11545-8 MAN11522-8 MAN11500-8 MAN11566-8 MAN11796-8 MAN11568-8 MAN11546-8 MAN11560-8 MAN11527-8 MAN11514-8 MAN11528-8 MAN11526-8
Exhaust Exhaust Exhaust Intake Intake Intake Intake Intake Intake Intake Exhaust Intake Intake Intake
Installed Height
Part No.
Type
Size
Stem
.100" Longer
Small Block Chevrolet 262-400 MAN11861-8 Exhaust 1.500"
.3415" .3415" .3415" .3415" .3415" .3415" .3415" .3136" .3133" .3136" .3136" .3133" .3415" .3415" .3415" .3715" .3415" .3415" .3415" .3715" .3100" .3715" .3415" .3415" .3415" .3415" .3415" .3415" .3415" .3415"
Stock Stock
MAN11863-8 MAN11877-8 MAN11321-8 MAN11860-8 MAN11318-8 MAN11812-8 MAN11621-8 MAN11360-8 MAN11362-8 MAN11620-8 MAN11761-8 MAN11872-8 MAN11720-8 MAN11874-8 MAN11814-8 MAN11868-8 MAN11905-8 MAN11782-8 MAN11873-8 MAN11872-8 MAN11874-8
Exhaust Exhaust Exhaust Intake Intake Intake Exhaust Intake Intake Intake Exhaust Intake Intake Intake Intake Intake Exhaust Intake Exhaust Intake Intake
1.600" 1.600" 1.600" 1.940" 2.020" 2.080" 1.590" 2.000" 2.020" 2.165" 1.880" 1.880" 2.190" 2.190" 2.250" 2.250" 2.250" 1.600" 1.940" 2.020" 1.710" 2.190" 2.250" 1.760" 2.190" 2.250" 1.770" 2.110"
.100" Longer .200" Longer .100" Longer .100" Longer Stock
.100" Longer
Stock
.100" Longer .100" Longer
Big Block Chevrolet 396-454 - Stock 3/8" Stem Dia. MAN11517-8 Exhaust 1.725" .3715"
Small Block Chevy Gen. III LS1/LS2 MAN11361-8 Exhaust 1.550"
Stock Stock Stock Stock Stock
Stock Stock Stock Stock Stock
Chrysler 6.1L Hemi With Triple Groove MAN11670-8 Intake 2.100”
Big Block Chevrolet 396-454 MAN11881-8 Exhaust
.3125”
Stock
Stock
Chrysler 6.4L Hemi With Bead Loc Groove, 2011-Up MAN12330B-8 Intake 2.140” .3125”
.100" Longer
Stock
Stock
Big Block Chrysler 383-426 Wedge-440 MAN11859-8 Exhaust 1.740"
.100" Longer
.3720" .3720" .3720" .3725" .3415" .3420" .3415"
Stock Stock Stock Stock Stock Stock
Stock
MAN11891-8 MAN11892-8 MAN11890-8
Exhaust Intake Intake
1.810" 2.080" 2.140"
.100" Longer .250" Longer
Small Block Chrysler 340-360 MAN11781-8 Exhaust
Small Block Ford 289-302-351W MAN11575-8 Exhaust 1.550"
Stock Stock Stock Stock Stock Stock Stock Stock Stock Stock Stock
MAN11578-8 MAN11566-8*
Intake Intake
1.850" 2.020"
Stock * Ford valves with .250" tips must use non rail type rockers or roller rockers.
Ford 351C
Severe Duty “Pro-Flo” Valves Severe Duty “Pro-Flo” Valves offer many of the same features as the Race-Flo line, but are made of severe duty material. “Pro-Flo” design offers an increase in flow up to 40% over other popular designs. Exhaust valves are made from XH-428 stainless steel and intake valves are made from NK-844 stainless steel. Valve stems are fully chromed with hard- ened tips. Valves are swirl polished and fully machined. Sold in sets of eight. Also available individually (to order, replace the -8 with a -1 at end of part number).
Big Block Ford 429-460 MAN11875-8 Exhaust
MAN11872-8 MAN11874-8
Intake Intake
Pontiac 400-455 MAN11355-8
Exhaust Intake
MAN11364-8
Extreme Duty Exhaust Valves Valves are made of extremely hard XH-432 Xtremeal- loy material for severe, high temperature applications. Sold in sets of eight. Also available individually. To order, replace the -8 with a -1 at end of part number. Offered in 11/32" (.3415") and 3/8" (.3715") stem diameters.
Installed Height
Installed Height
Part No.
Type
Size
Stem
Part No.
Size
Stem
Small Block Chevrolet 262-400 MAN11827-8 Exhaust
Big Block Chevrolet 396-454 MAN11743-8 1.880"
1.600" 1.600" 2.020" 2.055" 2.080"
.3415" .3415" .3415" .3415" .3415"
Stock
.3415" .3415" .3715" .3715"
Stock
MAN11823-8 MAN11830-8 MAN11824-8 MAN11772-8
Exhaust Intake Intake Intake
.100" Longer
MAN11737-8 MAN11587-8 MAN11735-8
1.880" 1.880" 1.940"
.100" Longer
Stock
Stock
.100" Longer .100" Longer
.100" Longer
Big Block Chevrolet 396-454 - Stock 3/8" Stem Dia. MAN11831-8 Exhaust 1.880" .3715"
Stock Stock
MAN11832-8 MAN11534-8
Intake Intake
2.190" 2.250"
.3720" .3720"
.200" Longer
410
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