* To purchase individually, substitute -1 for the -8 suffix in part number.
Severe-Duty Valves Made of XH-428 stainless steel which has double the tensile strength of imported valves at 1500°F. Nk-844 stainless steel intake valves have a fatigue strength 1000 times greater than imported valves. Sold in sets of 8. Part No. Type Size Stem Installed Height Small Block Chevrolet 262-400 MAN11567-8* Exhaust 1.500" .3415" Stock MAN11543-8* Exhaust 1.600" .3415" Stock MAN11595-8 † Exhaust 1.600" .3415" Stock MAN11539-8 # Exhaust 1.600" .3415" .100" Longer MAN11869-8 Exhaust 1.600" .3415" .100" Longer MAN11749-8 S Exhaust 1.600" .3415" .100" Longer MAN11705-8‡ Exhaust 1.600" .3415" .200" Longer MAN11865-8 S Exhaust 1.600" .3415" .200" Longer MAN11751-8 S Exhaust 1.600" .3415" .200" Longer MAN11755-8 S Exhaust 1.600" .3415" .400" Longer MAN11513-8 S Exhaust 1.600" .3415" .500" Longer MAN11763-8 S Exhaust 1.625" .3415" .600" Longer MAN11592-8 Intake 1.937" .3415" Stock MAN11886-8 Intake 1.940" .3415" .100" Longer MAN11826-8 Intake 2.020" .3415" .100" Longer MAN11846-8 Intake 2.055" .3415" .100" Longer MAN11818-8 Intake 2.080" .3415" Stock MAN11844-8 Intake 2.080" .3415" .100" Longer MAN11858-8 Intake 2.080" .3415" .200" Longer Small Block Chevy Gen. III LS1/LS2 (LS6 Head) MAN11673-8 Exhaust 1.550" .3136" Stock MAN11675-8 Exhaust 1.575" .3136" Stock MAN11681-8‡ Exhaust 1.575" .3136" Stock MAN11677-8 Exhaust 1.600" .3136" Stock Small Block Chevy Gen. IV LS7 MAN11679-8 Exhaust 1.610" .3136" Stock MAN11688-8 Intake 2.205" .3133" Stock * 7° dish face and 4.911" length # Valve has 10° underhead angle. † Flat face and 4.936" length S Valve has 15° underhead angle. ‡Extreme duty valve made from top-of-the-line XtremeAlloy exhaust material. GM LS NexTek Valve Spring Kits NEW! Designed for popular GM LS engines with a maximum valve lift of .660", each kit is complete with (16) high-performance NexTek valve springs, (16) valve spring locators, (16) 7° retainers, (16 pair) 7° ma- chined valve locks, and (16) Viton valve stem seals. Choose from kits with steel or lightweight titanium retainers. Part No. Description MAN26362134KS Valve Spring Kit with Steel Retainers MAN26362334KS Valve Spring Kit with Titanium Retainers NexTek Series Oval Track Valve Springs Put an end to spring degradation. NexTek springs are made from specially wound, heat-treated, and ¿QLVKWUHDWHGFKURPHVLOLFRQ6SULQJ,'¶VDUHIXOO\ chamfered for retainer clearance. Sold in sets of 16. Late Model, Flat Tappet MAN221432-16 1.530"/.750" .630" 162@1.900" 425@1.300" 1.200" Oval Track, Roller MAN221440P-16† 1.570"/.760" .700" 255@2.000" 629@1.300" 1.190" MAN221441P-16† 1.570"/.750" .730" 280@2.030" 700@1.300" 1.215" MAN221442-16 1.560"/.812" .750" 260@2.000" 660@1.250" 1.200" BGN, WoO, LM MAN221443-16 1.580"/.832" .730" 235@1.950" 610@1.250" 1.170" MAN221443P-16† 1.580"/.832" .730" 235@1.950" 610 @ 1.250" 1.170" MAN221444-16 1.610"/.842" .750" 235@2.050" 645@1.300" 1.220" Oval Track, Roller MAN221445P-16† 1.620"/.852" .800" 280@2.050" 680@1.250" 1.200" MAN221452SF-16* 1.550"/.800" .825" 250@2.025" 750@1.200" 1.150" Sportsman MAN221454-16 1.650"/.855" .850" 290 @ 2.000" 825 @ 1.150" 1.105" * Signifies Super Finished. † Signifies polished finish. Part No. O.D./I.D. Max. Valve Lift Seat Pressure Open Pressure Coil Bind
10° Titanium Retainers Manley’s 6AL 4V titanium 10° re- tainers have the durability needed for racing engines. Sold in sets of 16.
Dimensions
Spring Type Height
Part No.
Spring O.D.
A
B
C
D
MAN23640-16 Double +.100" 1.625"
1.500" 1.175" .850" —
MAN23644-16 Double Std. 1.500" 1.140" .740" — MAN23648-16 Double +.100" 1.580"/1.610" 1.500" 1.150" .825" — MAN23650-16 Double +.100" 1.550" 1.500" 1.140" .740" — MAN23654-16 Double Std. 1.625" 1.500" 1.175" .765" — MAN23655-16 Double +.100" 1.625" 1.500" 1.175" .765" — MAN23658-16 Double Std. 1.550" 1.500" 1.105" .710" — MAN23660-16 Double +.100" 1.550" 1.500" 1.105" .710" — MAN23661-16 Double +.100" 1.550" 1.500" 1.120" .705" — Valve Locks 1.550"
Heat-treated, black oxide-coated steel locks are available in extra-thick Super 7° or tradi- tional 10° for conventional or bead lock valves. Sets of 8 (16 pieces) or 16 (32 pieces). Part No. Description Installed Height
Lock Style
Super 7°
MAN13050-8 MAN13051-8 MAN13052-8 MAN13060-8 MAN13061-8 MAN13062-8 MAN13080-16 MAN13081-16 MAN13083-16 MAN13084-16 Machined 7° MAN13094-16 MAN13096-16 MAN13097-16* MAN13150-8 MAN13151-8 10° MAN13152-8 MAN13160-8 MAN13161-8** MAN13162-8 MAN13170-8 MAN13194-16 MAN13195-16 MAN13198-16
5/16” Valve Locks 5/16" Valve Locks 5/16" Valve Locks 11/32” Valve Locks 11/32" Valve Locks 11/32" Valve Locks 5/16" Valve Locks 11/32" Valve Locks 11/32" Valve Locks 11/32" Valve Locks
.050” Less Standard .050" More .050” Less
Bead Loc Bead Loc Bead Loc Bead Loc Bead Loc Bead Loc
Standard
.050" More Standard .050" Less Standard
Conventional Conventional Conventional
.050" More Conventional
8mm Valve Locks
.050” Less
GM LS/LT-1
5/16" Valve Locks 11/32" Valve Locks 5/16” Valve Locks 5/16" Valve Locks 5/16" Valve Locks 11/32" Valve Locks 11/32" Valve Locks 11/32" Valve Locks 7mm Valve Locks 11/32" Valve Locks 3/8" Valve Locks 11/32" Valve Locks
Standard Standard .050” Less Standard .050" More .050" Less Standard .050" More
Conventional Conventional
Bead Loc Bead Loc Bead Loc Bead Loc Bead Loc Bead Loc Bead Loc
Standard Standard Standard
Conventional Conventional
.050" More Conventional * Not recessed to accept a wear cap. ** Lightweight titanium material Titanium 10° Valve Locks Lightweight valve locks are precision crafted from durable titanium Part No. Valve Stem Installed Height Groove Type Qty. MAN13084T-16 .3415” .050” More Conventional 16 Pair MAN13151T-8 .3110" Standard Bead Loc 8 Pair MAN13161T-8 .3415" Standard Bead Loc 8 Pair MAN13194T-16 .3415" Standard Conventional 16 Pair
JIMMY MARS
TODD HEALEY
536
CIRCLE TRACK 2021-22
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