Hi Performance Automotive
Gaskets

350 & 400 SB2 Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5321-040 $86.16	4.125"	MLS / C.O.T. - .040"	1	Discounted Prices
C5323-040 $86.16	4.165"	MLS / C.O.T. - .040"	1	Discounted Prices
C5472-040 $86.16	4.190"	MLS / C.O.T. - .040"	1	Discounted Prices
C5324-040 $86.16	4.200"	MLS / C.O.T. - .040"	1	Discounted Prices

396, 402, 427, 454, 502 Mark IV & Bow Tie Hi-Perf. 2 Each End Lower 3 Open Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5816-040 $96.82	4.320"	MLS / C.O.T. - .040"	1	Discounted Prices
C5329-040 $96.82	4.375"	MLS / C.O.T. - .040"	1	Discounted Prices
C5330-040 $96.82	4.540"	MLS / C.O.T. - .040"	1	Discounted Prices
C5331-040 $96.82	4.630"	MLS / C.O.T. - .040"	1	Discounted Prices

396, 402, 427, 454, 502 MarkV & Mark VI 1 Each End Lower 3 Open Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5817-040 $96.82	4.320"	MLS / C.O.T. - .040"	1	Discounted Prices
C5332-040 $96.82	4.375"	MLS / C.O.T. - .040"	1	Discounted Prices
C5333-040 $96.82	4.540"	MLS / C.O.T. - .040"	1	Discounted Prices
C5334-040 $96.82	4.630"	MLS / C.O.T. - .040"	1	Discounted Prices

Mercury Gen IV, V & VI Blocks 4 Bolt Intake Side of Gasket Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5634-051 $88.61	4.500"	MLS / C.O.T. - .051"	1	Discounted Prices
C5635-051 $88.61	4.530"	MLS / C.O.T. - .051"	1	Discounted Prices
C5636-051 $88.61	4.580"	MLS / C.O.T. - .051"	1	Discounted Prices
C5637-051 $88.61	4.600"	MLS / C.O.T. - .051"	1	Discounted Prices

Mercury Marine 1050 Engine Gen IV & Dart Block 2 Bolt Intake Side of Gasket Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5638-051 $88.61	4.500"	MLS / C.O.T. - .051"	1	Discounted Prices
C5639-051 $88.61	4.530"	MLS / C.O.T. - .051"	1	Discounted Prices
C5640-051 $88.61	4.580"	MLS / C.O.T. - .051"	1	Discounted Prices
C5641-051 $88.61	4.600"	MLS / C.O.T. - .051"	1	Discounted Prices

Mercury Marine 526/625 Gen VI Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5760-040 $96.82	4.470"	MLS / C.O.T. - .040"	1	Discounted Prices

Mercury Marine 8.1L 496 Right Side Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5761-051 $96.82	4.280"	MLS / C.O.T. - .051"	1	Discounted Prices
C5762-051 $96.82	4.350"	MLS / C.O.T. - .051"	1	Discounted Prices
C5763-051 $96.82	4.450"	MLS / C.O.T. - .051"	1	Discounted Prices

Mercury Marine 8.1L 496 Left Side Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5764-051 $96.82	4.280"	MLS / C.O.T. - .051"	1	Discounted Prices
C5765-051 $96.82	4.350"	MLS / C.O.T. - .051"	1	Discounted Prices
C5766-051 $96.82	4.450"	MLS / C.O.T. - .051"	1	Discounted Prices

Brodix Big Duke / Big Brodie Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5432-040 $88.61	4.310"	MLS / C.O.T. - .040"	1	Discounted Prices
C5433-040 $88.61	4.570"	MLS / C.O.T. - .040"	1	Discounted Prices
C5434-040 $88.61	4.630"	MLS / C.O.T. - .040"	1	Discounted Prices

ZL1 Head Gasket
Part #	Bore	Material	Pkg Qty	Purchase Online
C5746-040 $96.82	4.250"	MLS / C.O.T. - .040"	1	Discounted Prices
C5747-040 $96.82	4.300"	MLS / C.O.T. - .040"	1	Discounted Prices
C5759-040 $96.82	4.375"	MLS / C.O.T. - .040"	1	Discounted Prices

Material Acronyms: AFM - Aluminum Foam Coated, AM - Armor Clad, CFM-20 - Perforated steel core with elastomer coating, KF - Aramid Fiber, RC - Rubber Coated, S - Spring Steel

• Installing a COMETIC MLS (Multi Layer Steel) Head Gasket - The first thing you must do before installing the gasket, check all associated hardware thoroughly for nicks, scratches, or damaged threads as well as checking all threaded holes. If the hardware is inadequate or damaged, gasket failure may be eminent. Also change all the bolts and tap all threaded holes with the appropriate thread chase or cleaning tap. All hardware and mating surfaces should be free from any old sealers, rust, or carbon.
  Check your dowel pins as they register the gasket and head into proper location. Replace worn or damaged dowels. The gasket mating surfaces must be smooth 50RA or finer. Additional sealer is not required with Cometic MLS Head Gaskets. The outer layers of the gasket are coated with a .001" thick coating of viton (a high temperature flouroelastomer).
  Check brass rivet location to ensure the brass river does not interfere with the sealing surface on both the block and head. If the brass rivet needs to be removed a pair of side cutters will give the best results. Remove only the brass rivet.
  Once the gasket is in position double check all passages and overall fitment paying special attention to the bore and chamfer. The gasket should not fall in the bore or lay on the chamfer area. A gasket lying on the chamfer or in the bore will most likely cause a hot spot and lead to pre-ignition, possibly causing severe engine damage or gasket failure.

• Head Gasket Torque Procedure - If you are using studs or head bolts, torque hardware to the manufacturers specification. Fasteners works like a springs and must have proper Torque or Stretch applied to carry the correct amount of clamp force. Also use the proper lube or thread sealer for the job. All fasteners must be final torqued before thread sealant cures to achieve proper torque.
  Torque the fasteners in the correct sequence. It is critical to follow manufacturers torque sequence to apply clamp force evenly. A smooth continuous motion is important for every torque sequence. Re-torque is not necessary unless using hardware that has not been heat cycled.

Warranty Disclaimer*
Due to the nature of performance applications, the parts in this catalog are sold without any express warranty or any implied warranty of merchantability or fitness for a particular purpose. Cometic Gasket Inc. shall not, under any circumstances, be liable for any special, incidental or consequential damages, including, person, party or property, but not limited to, damage, or loss of property or equipment, loss of profits or revenue, cost of purchased or replacement goods, or claims of customers of the purchase, which may arise and/or result from sale, installation or use of these parts. Installations of these parts could adversely affect the motor manufacturers warranty coverage.