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Gaskets & Sets - Timing Cover Gasket

Standard Jacketed Header - Big Block Chevy Jet Drive 36" Wide
Starting From:
$2,325.99
This Part has options, please click the button below to order.

Lightning Big Block Chevy Jet Drive 36" Wide Standard Jacketed Header

310-40 + Option(s)

Standard Jacketed Header - Big Block Chevy Jet Drive 36" Wide

These headers are designed to be a replacement for Jet manifolds. However, they terminate approximately 8" aft of stock manifolds and are projected to meet the exhaust tips providing they are in the stock location. Headers will have about 1/2" clearance between header and tall Moroso valve covers. Headers come complete with bolts, gaskets, water fittings, pet cocks, etc. (less 4" hose and 4" hose clamps). Factory oil filter requires relocation.

LIGHTNING PERFORMANCE
When comparing performance exhaust systems it's good to understand the different systems on the market today and the performance demands of your engine. Understanding how a header works will help you decide on which exhaust system is best suited for your application.

Headers have two basic functions. First is to simply relieve back pressure. For example, when looking at a manifold you see a 4" diameter exhaust hose, but the actual exhaust gas opening is about 2-1/2" diameter. Most performance manifolds and some header manufacturers use a 4" exhaust hose and 3" or 3-1/2" OD exhaust gas tube. All of these headers use a 4" OD exhaust gas tube and a 5" water jacket tube until the water gets introduced into the exhaust gas stream, then it gets reduced from 5" to its 4" exhaust hose diameter. At no time does the exhaust gases see a diameter smaller than 4" OD. When looking at these exhaust gas openings consider their area not their diameter. For example, a 4" OD opening has an area of approximately 12.56 sq. in. A 3-1/2" opening has an area of approximately 9.62 sq. in.That is 25% smaller! A 3" opening is approximately 7.06 sq. in. and a 2-1/2" opening is approximately 4.90 sq. in. which is 60% smaller.

LIGHTNING HORSE POWER COMPARISON
Performance figures on headers vary considerably. As a rule, the higher horsepower engines benefit more than the lower horsepower engines. For example, the 330 hp Mercury engine will gain approximately 50 to 75 rpm, where as the 365 hp Mercury engine will gain approximately 300 to 400 rpm (45 hp). Blown engines gain up to 800 rpm (80 hp). Of course this is comparing these headers against stock Mercury center rise manifolds.

LIGHTNING CONSTRUCTION
Our Magnum header starts with Mandrel bent 316L stainless steel interior tubes. The exterior tubes are Mandrel bent heavy wall steel tube (.074). The tubes are then mechanically etched by sand blasting and then assembled. Finally, a corrosion resistant silicone ceramic coating is applied to the interior of the header while the exterior receives a powder coat finish.

ALL THIS PLUS THE BEST 2-YEAR WARRANTY IN THE INDUSTRY

Through continuing research Lightning Mfg. has developed a Dual Porcelain Coating that resists the harshest of salt water environments. Now as an option they are able to apply the same high tech coating to a 316L stainless steel lined header once thought to be the cracking alloy and render it crack resistant.


Lightning Exhaust Dry Headers for Big Block Chevy Applications (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Dry Headers for Big Block Chevy Applications (Quote Only)

310-Dry-Headers + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Mercury Headers
Lightning Generic Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for 460 Ford Applications (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for 460 Ford Applications (Quote Only)

310-Headers-460 + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Generic Headers

NOTE: All 460 Ford Lightning Headers use adapters to mount to engine.

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only.

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for 8.1L / 496 Applications (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for 8.1L / 496 Applications (Quote Only)

310-Headers-496 + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Mercury Headers
Lightning Generic Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for Big Block Chevy Jet / V-Drive (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for Big Block Chevy Jet / V-Drive (Quote Only)

310-Headers-BBC-Jet + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for LS Applications (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for LS Applications (Quote Only)

310-Headers-LS + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Mercury Headers
Lightning Generic Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for Mercruiser Big Block Chevy (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for Mercruiser Big Block Chevy (Quote Only)

310-Headers-BBC-Merc + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Mercury Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Lightning Exhaust Headers for Small Block Chevy Applications (Quote Only)

Starting From:
$0.00
This Part has options, please click the button below to order.

Lightning Exhaust Headers for Small Block Chevy Applications (Quote Only)

310-Headers-SBC + Option(s)

NOTE: All Lightning Headers are now built to order by quote only. Please select your options below and we will have a price and turn around time quoted to you as soon possible. Please make sure your contact information (e-mail address and phone number) are correct when placing an order for a quote. 

All orders of Lightning Headers will require you to provide measurements, see these diagrams:

Lightning Jet Headers
Lightning Mercury Headers
Lightning Generic Headers

Please select all the options below you wish to have on your headers. By ordering this item you are asking for a quote only. 

FREE GROUND SHIPPING TO THE LOWER 48 UNITED STATES!


Timing Chain Cover Gasket
Your Price:
$2.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Chain Cover Gasket

676-18-0976

Additional Details:

  • Fits: MCM/MIE 175, 185 & 4.3L/LX (1983-1992) & GM V-8 (283, 305,327 & 350) (1963-1995)

Interchanges/Replaces

Crusader

  • 20129

GLM

  • 30530

Mallory

  • 9-61600

Mercruiser Stern Drive

  • 27-14250
  • 27-34895
  • FI1101297

Timing Chain Gasket Set
Your Price:
$13.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Chain Gasket Set

676-18-4375

Additional Details:

  • For: Mercruiser GM 153 & 181 eng; 110, 120, 130, 140, 150, 160 & 165 hp; 2.5L & 3.0L

Interchanges/Replaces

GLM

  • 39710

Mallory

  • 9-61603

Mercruiser Stern Drive

  • 27-34213A1
  • 27-34213A2

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-0327GLM
  • 31350
Mallory
  • 9-60067
Mercruiser Stern Drive
  • 27-33956
  • 27-810848
  • 27-879150138
  • FI5000200
  • FI5000219
OMC Stern Drive
  • 311851
  • 3853342
  • 914819
Volvo Penta
  • 3853342
1Water Pump Gasket N/A
18-0887GLM
  • 30360
Mallory
  • 9-61602
Mercruiser Stern Drive
  • 27-34216
  • 27-49953
  • FI5000201
OMC Stern Drive
  • 3852691
  • 912988
  • 913275
Volvo Penta
  • 3852691
Yamaha Sterndrive
  • YSG-14096-15-6G
1Timing Cover Gasket N/A
18-0889Chris-Craft
  • 16.50-00074
GLM
  • 31360
Mallory
  • 9-61041
Mercruiser Stern Drive
  • 27-34213
  • 27-56883
  • FI5000074
OMC Stern Drive
  • 311064
  • 3852095
Pleasurecraft
  • 3705042
Volvo Penta
  • 3852095
Yamaha Sterndrive
  • YSG-10114-14-1G
1Fuel Pump Gasket N/A
18-0948GLM
  • 32300
Mercruiser Stern Drive
  • 27-87707
1Distributor Gasket N/A

Timing Cover Gasket
Your Price:
$9.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Cover Gasket

676-18-0980

Additional Details:

  • Fits: MCM/MIE GM V-8 (427, 454, 482 & 502 cid) engines (1969-1992)
  • Fits: MCM 500 Bulldog, 575 & 800SC (1990 & Up)

Interchanges/Replaces

GLM

  • 30440

Mercruiser Stern Drive

  • 27-49109
  • 27-54529
  • FI1100990
  • FI110990

OMC Inboard

  • 3935449

OMC Stern Drive

  • 3935449

Timing Cover Gasket
Your Price:
$3.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Cover Gasket

676-18-0887

Key Features:

  • For: 4 & 6 Cyl.

Additional Details:

  • Fits: MCM 120/2.5L, 140/3.0L/LX & 160/165 (6 cyl.) (1963 & Up)

Interchanges/Replaces

GLM

  • 30360

Mallory

  • 9-61602

Mercruiser Stern Drive

  • 27-34216
  • 27-49953
  • FI5000201

OMC Stern Drive

  • 3852691
  • 912988
  • 913275

Volvo Penta

  • 3852691

Yamaha Sterndrive

  • YSG-14096-15-6G

Timing Cover Seal
Your Price:
$23.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Cover Seal

676-18-1213

Interchanges/Replaces

Mallory

  • 9-61610

Mercruiser Stern Drive

  • 26-11973
  • 26-34218
  • 26-42750
  • 26-49952
  • 26-54799
  • 26-59342
  • 26-79223
  • 26-97335
  • FI1100202
  • FI1100806
  • FI1101076
  • FI1101263
  • FI3835946
  • FI5110043

OMC Stern Drive

  • 3853341
  • 912989
  • 914817

Volvo Penta

  • 3853341
  • 856665

Timing Cover Seal
Your Price:
$19.99

Normally Ships in 7-10 Days. Rush proccessing is available on Mallory items: See here.

Timing Cover Seal

676-18-1233

Interchanges/Replaces

Mallory

  • 9-61612

Mercruiser Stern Drive

  • 26-49154
  • 26-821947
  • 26-8219471
  • FI1100986

OMC Inboard

  • 3860095

OMC Stern Drive

  • 3860095