1985 GMC C2500 Performance Engines

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

• Rigid core, molded silicone rubber gaskets utilize the one-piece molded rubber technology for a perfect fit, ease of installation and include compression limiters to prevent overtightening.
• Not intended for use in emission controlled vehicles.

Dowel pins are precision machined and case hardened for accurate head alignment. Two per set. 5/16 inch x 5/8 inch

Product Features:

• Precision Machined
• Case Hardened
• Give Accurate Alignment
• 2 Per Set

Mr. Gasket Steel Shim Cylinder Head Gaskets are for high performance street machines, drag racing and oval track racing. With today’s extreme compression ratios you need stronger more durable gaskets. Mr. Gasket steel shim gaskets are made from .020 inch steel shim stock which is thinner than most composite gaskets increasing engine compression. Stress formed embossments will seal the extreme cylinder pressure.

Product Features:

• Manufactured from .020″ steel shim stock.
• Thinner than composition head gaskets – increases engine compression.
• Stress formed embossments seal extreme cylinder pressures.
• For high performance street, drag race and oval track use.

Mr. Gasket competition screw-in rocker arm studs are manufactured from heat treated black oxide coated Grade 8 steel. Ideal for high performance street and race applications.

Product Features:

• Black Oxide Coated Grade 8 Steel
• Kit Contains 16 Studs
• Easy To Install
• Heat Treated Steel
• Prevents Stud Flexing
• Black Plated Finish

Product Features:

• Standard Impeller Rotation
• 0.625 in. Pilot Shaft
• 0.750 in. Ball/Ball Bearing
• 7.3125 in. Block To Hub Height
• Satin Finish

With Mr. Gasket cam degree bushings you fine tune the camshaft timing of your engine to as little as 1 degree. Even aftermarket timing sets with multiple keyways can’t give the range of adjustment these bushings allow. Retard your camshaft to lower the powerband for more low end torque and midrange horsepower, or advance for more top end power. This kit does even number adjustment 0-8 degrees.

Product Features:

• Advance the cam for increased torque and horsepower
• Tune your powerband for more end torque or increase top end horsepower
• Includes (4) offset bushings and (1) 0 degree bushing
• Cam sprocket dowel pin hole must be drilled to .406¿ (13/32¿) dia.
• Cam sprocket dowel pin hole must be drilled to .406┐ (13/32┐) dia.
• Increase Top-End Horsepower

Ultra-Seal intake manifold gaskets are manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Incorporates Silicone beading around each intake and water outlet port to provide additional sealing strength on both sides of each gasket. No gasket sealer required. For OE replacement, high performance street, drag race and oval track use. Includes manifold end seals and distributor gasket.

Product Features:

• Manufactured from cellulose/nitrile composition gasket material
• Provides excellent sealing and durability
• Silicone beading on both sides of each gasket
• Complete with manifold end seals and distributor gasket
• For OE replacement, high performance street, drag race and oval track use
• Creates Tight Leak proof Seal

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

• Blue Stripe performance cork-rubber gaskets use cork particles evenly distributed throughout a rubber binder resulting in a compressible gasket without leak paths.
• Not intended for use in emission controlled vehicles.

Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:

• Opens At 180 Degrees
• Designed to Resist Large Variations of Coolant Pressure at High RPM
• Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
• For High Performance Street, Drag Race, and Oval Track
• Copper & Brass Construction – Resists Corrosion
• High Flow

Product Features:

• Case-Hardened Tubing
• Surface Hardening
• Welded Ends
• 0.3125 in. Diameter
• Use with or without Hardened Steel Guideplates

These grade 8 alloy steel, longer length bolts are designed to compensate for thread length lost when using head bolt washers. This allows increased torque and clamping. Set of 16 does one cylinder head.

Product Features:

• Cylinder Head Bolts
• Longer-Than-Stock
• High Quality Grade 8 Alloy
• Increase Torque Settings
• Higher Clamp Loads On Gasket

HYDRAULIC – Thumpr: High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.

Product Features:

• HYDRAULIC – Thumpr: High performance street, stock converter ok, best with 2000+ converter and gears. Choppy/thumping idle.
• 279/296 Advertised Duration, 227/241 Duration @ .050″, .498″/.483″ Lift, 107 Lobe Separation
• Valve spring upgrade required

If you are changing your camshaft or replacing the timing set, make sure to replace this seal at the same time! Made from Nitrile rubber.

Product Features:

• Nitrile Rubber And High Density Cork
• Will Not Shrink Or Stick

Product Features:

• 3500-8000 RPM Range
• Single Plane Type-4500 Style Flange
• 6.77 in. Front Height, 6.77 in. Center Height, 6.77 in. Rear Height
• Satin Finish
• For Raised Port 23 Degree Heads

Valve spring retainers for use OE cast iron heads. Superior quality heat-treated steel. Machined for strength with black oxide finish. Finish ensures rust and corrosion protection.

Product Features:

• Valve Spring Retainers for Use OE Cast Iron Heads
• Superior Quality Heat-Treated Steel
• Machined for Strength with Black Oxide Finish
• Finish Ensures Rust and Corrosion Protection

Product Features:

• Use W/ Valve Springs Part #5703, 5794
• Set of 16
• 1.50 in. Outside Diameter
• Steel Material
• Black Oxide Finish

Product Features:

• Designed for Optimum Torque and Acceleration
• Maximum Performance From Idle through Mid-Range
• Matched to Edelbrock Performer Intakes
• Includes Hydraulic Lifters and Assembly Lube
• Major Improvement in Throttle Response and Torque
• Use For Daily Drivers/Trucks/Vans/RVs/4x4s
• Take The Guesswork Out Of Camshaft Selection

BIG BLOCK CHEVY HYDRAULIC CAM AND LIFTER KIT – Big Mutha’ Thumpr: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

Product Features:

• Cam and lifter kit for Big Block Chevy engines
• CL-Kit includes cam, lifters, assembly lube, instructions and decals
• HYDRAULIC – Big Mutha’ Thumpr: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
• 295/312 Advertised Duration, 243/257 Duration @ .050″, .522″/.507″ Lift, 107 Lobe Separation
• Valve spring upgrade required

These grade 5 hex head bolts are brite zinc plated for protection and appearance. Hardened flat washers provide uniform torque & prevent galling on aluminum manifolds. Includes twelve (12) 3/8 inch-16 x 1 inch bolts & washers

Product Features:

• Zinc plated to resist corrosion and provide a clean professional appearance
• Made from Grade 5 steel for strength and durability
• Flat washers provide uniform clamp load and prevent galling on aluminum intake manifolds
• Allen (socket) Head
• Zinc Plated For Protection

Finish your custom engine job with these show quality grade 5 chromed 12-point bolts, includes AN washers which have no exposed shoulder for a professional appearance. Includes (12) 3/8-16 x 1 inch bolts with (12) 3/8 inch AN washers.

Product Features:

• Chrome plated
• Grade 8
• 12-point head
• AN washers with no exposed shoulder for a professional appearance

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

• Fluoroelastomer compound combines optimum resistance to heat, oils and abrasion for longivity.
• Optimizes performance under high crankcase vacuum conditions, elevated temperatures and high RPM levels.
• Not intended for use in emission controlled vehicles.
• Not intended for use in emission controlled vehicles.

This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It’s also injection molded for a precise fit.

Product Features:

• Repairs That Leaky Rear Main Sail
• Silicone Rubber to Withstand Extreme Engine Oil Temperatures
• Upgrade for Rope Seal Equipped Cars or Direct Replacement for Rubber Main Seal
• Injection Molded for Precise Fit

Nitrous Holeshot Converters are Built with the same features as the other B&M Holeshots, with the addition of anti-balloon plates. The anti-balloon plates will allow these converters to stand up to the instant horsepower nitrous delivers.

Product Features:

• 3400-3800 RPM
• Small And Big Blocks
• Serious Performance
• Furnace Brazed
• Fully Balanced

HoleShot 3600 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) APPLICATION: HoleShot 3600 for GM 1965 to 1991 TH400, 425, 375 and 1968 to 1981 TH350, 375B (not 350C) A higher than stock stall speed as delivered by the Holeshot converter will provide several advantages and benefits in vehicles with modified engines. Many modifications, particularly big cams, tend to reduce low end power and torque. The high stall converter allows the engine to launch the car at higher rpm where more torque is available. The Holeshot is generally a very good choice for the typical street machine that is looking for better launch capability and more strength. Street rods with modified engines will also benefit from a Holeshot converter. If your vehicle is equipped with a plate type nitrous system, you will need a Nitrous Holeshot!! Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. Furnace brazed impeller. New precision steel alloy pump drive tube. New heavy duty needle bearing between stator and impeller (not a thrust washer). Needle bearing between stator and turbine. Furnace brazed turbine. Dual pattern drive lugs on some GM Holeshots. New turbine hub. New springs and rollers in stator.

Product Features:

• Furnace Brazed Impeller
• Steel Alloy Pump Drive Tube
• Heavy Duty Needle Bearing
• Between Stator and Turbine
• Furnace Brazed Turbine
• Dual Pattern Drive Lugs
• New Turbine Hub
• New Springs/Rollers In Stator

Product Features:

• Made of aluminum with a natural finish
• 100cc chambers with 290cc intake ports
• 2.19 in. intake and 1.88 in. exhaust valves
• Bare Cylinder Head
• Standard intake and exhaust port location

Product Features:

• 50-State Street Legal Aluminum Cylinder Head
• Out-of-the-Box Bolt-On Performance
• 70cc Combustion Chambers Improve Performance
• Retain Stock Compression Ratio

Complete kit includes retainers and locks. Springs made of highest quality spring wire. Springs precision wound to close tolerances. Includes superior quality steel retainers. Includes 7 degree heat-treated valve stem locks. Retainers and locks are black oxide coated. Non-rotator style: Dyno tested and street proven. Great match to Edelbrock camshaft kit.

Product Features:

• Complete Kit: Includes Retainers And Locks
• Springs Made of Highest Quality Spring Wire
• Springs Precision Wound To Close Tolerances
• Includes Superior Quality Steel Retainers
• Includes 7 deg. Heat-Treated Valve Stem Locks
• Retainers and Locks Black Oxide Coated
• Non-Rotator Style: Dyno Tested and Street Proven
• Great Match to Edelbrock Camshaft Kit

Single Outer Valve Springs from COMP Cams allow you to build the perfect spring assembly for your application. The valve spring creation process is far more involved than most people realize. Selecting the right metal stock and creating the best design is not done by chance. COMP Cams has developed a process that creates the highest quality valve spring available. The result is a product that meets and exceeds the expectations of today’s engine builders and racers.

Product Features:

• Seat pressure: 105 lbs. @ 1.700″, Open Pressure: 273 lbs. @ 1.250″
• O.D.: 1.254″, I.D.: .880″
• Single valve springs with damper
• Approximately .490″ max lift at recommended installed height