2-Piece Valve Cover Kit for Big Block Chevrolet (Pair)

These valve covers are not only the most beautiful addition to any Big Block Chevrolet marine engine they also solve one of the most difficult and annoying tasks for power boaters, inspection and adjustment of your engines valve train! Sold in Pairs for one engine.

The PATENTED two piece design allows access for inspection and maintenance without removal of the exhaust system. Once the receiver rail is installed you will never have to worry about cleaning, replacing, or scraping valve cover gaskets again. The patented valve cover receiver rail stands 3/4" tall and prevents oil from running down the side of your engine while the cover is removed. A positive o-ring seal assures a leak free seal between the covers and receiver rail, but best of all the cover is removed via two integrated thumb screws. That’s right no tools required here. The cover can be removed and replace in just minutes. Allowing more time for what you want to do most — powerboating.

NOTE 1: You should tighten the valve cover rail to head at 130/120 in lbs. and the wing nuts to 25/20 ft lbs.

NOTE 2: Purple, Red, Yellow, Silver and Black Colors will have two week lead time.

NOTE 3: SATIN valve covers are unfinished. They will need to prepped if you intend to paint, polish, anodize or powder coat them.

AFR proudly presents the Magnum Intake Manifold, the ultimate power upgrade for your Big Block Chevy engine. Crafted with precision and engineered to perfection, this manifold is the key to unlocking a new level of performance for your street vehicle. Designed to seamlessly integrate with our acclaimed AFR Magnum Oval port cylinder heads, this manifold promises a hassle-free enhancement to your engine’s capabilities. Say goodbye to the painstaking task of port matching, as it is a direct bolt-on solution for our select cylinder heads*. The Magnum Intake Manifold utilizes a dual-plane design, featuring runners that are custom-tailored for high-horsepower applications thriving in the 1800-6200 RPM range. Elevate your driving experience today with AFR’s Magnum Intake Manifold – where power meets precision. 

• Carb Flange Height: Front: 5.22” Middle: 5.39” Rear: 5.57”
• 1800-6200 RPM optimal operating range
• Designed for a standard/ stock block height
• 4150 carburetor flange *Best fit for AFR Magnum Oval Port 265cc, 290cc, and 300cc cylinder heads
• May require porting to match other cylinder heads.

Big Block 525 Merc EFI/700 Replacement Exhaust System (Standard Exit)   

Stainless Marine has been building quality marine exhaust systems for a number of years. So when theneed arose for a manifold option or solution for the popular Mercury racing 525/600 and 700 EFI enginesthey were right on top of it. Stainless marine has designed an exhaust pattern machining fixturethat when attached to the factory cylinder head will allow boring, drilling, machining and tapping of auxiliaryexhaust system attachment holes. These new holes will allow attachment of one of their traditional H/Pmanifold systems. Exhaust exits are designed for standard Bravo exit locations.

Note: Machining of Cylinder Heads is required to use these manifolds. A machining fixture is available for rent to facilitate this.

Big Block Chevy 2-Piece Valve Covers w/Valve Spring Oilers (pair)

These valve covers are a Keith Eickert exclusive product that have been designed to solve the problem of excessive valve spring fatigue and failure caused by long duration engine operation at higher engine RPM's.  An industry standard in all forms of professional racing can now be added to your engine that will dramatically extend valve train life.  The oiling rail systems are available for both standard traditional valve covers as well as for the Keith Eickert 2-piece valve covers.  The oiling system rail measures 3/8" thick and incorporates eight precision-metered oil-spray jets that distribute additional oil towards each valve spring assembly.  Simple single oil inlets per rail provide easy plumbing.

Big Block Chevy Gil Replacement Bravo Standard Dry Offshore System

The dry exhaust system is designed for ultra hi-performance engines, especially those with high overlap cams.  The water jacketed pipes extend through the transom and keep the exhaust gasses dry all the way to the end.  More and more competitive offshore racers are using the Hardin Offshore Dry System.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Note:  Pricing indicated includes STANDARD DIMENSION Tailpipes only.  Custom Tailpipes may incur additional charges depending on the length and complexity of the tailpipe required.

Big Block Chevy Gil Replacement Bravo Wet Offshore System

Hardin Marine Offshore Wet Systems are designed for hi-performance and stock engines.  This system mixes and discharges exhaust gasses with cooling water at the end of the exhaust pipe, and then a rubber hose connects up to your exhaust thru-hull ports.  Custom pipes are also available for custom installations and are priced by measurements given. 

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardin coated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Priced according to your dimensions.  Submit your custom measurements for a price quote.

Big Block Chevy Gil Replacement Custom Dry Offshore System (Tailpipes built to your dimensions)

The dry exhaust system is designed for ultra hi-performance engines, especially those with high overlap cams.  The water jacketed pipes extend through the transom and keep the exhaust gasses dry all the way to the end.  More and more competitive offshore racers are using the Hardin Offshore Dry System.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are coated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

Note:  Pricing indicated includes STANDARD DIMENSION Tailpipes only.  Custom Tailpipes may incur additional charges depending on the length and complexity of the tailpipe required.

Priced according to your dimensions.  Submit your custom measurements for a price quote.

Big Block Chevy Gil Replacement Custom Wet Offshore System (Tailpipes built to your measurements)

Hardin Marine Offshore Wet Systems are designed for hi-performance and stock engines.  This system mixes and discharges exhaust gasses with cooling water at the end of the exhaust pipe, and then a rubber hose connects up to your exhaust thru-hull ports.  Custom pipes are also available for custom installations and are priced by measurements given.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardin coated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Priced according to your dimensions. Submit your custom measurements for a price quote.

Big Block Chevy Gil Replacement Magnum Choice with Polished Risers

This is the easiest bolt on system for increasing horsepower and performance.  The kit includes shift, electrical and oil filter brackets for easy installation.  This system fits all MerCruiser small and big block Chevy engines equipped with MerCruiser Silent Choice systems.  This system will save up to 75 lbs. in weight over cast iron systems.  All manifolds are coated and built for power and long life.

Hardin Exhaust Systems perform better because they're made better, with great attention to detail in design, engineering and manufacturing.  These manifolds are Hardincoated inside and out, proven to protect better than conventional marine coatings.  These exhaust pipes are designed to keep cooling water separated from the exhaust flow to avoid corrosion of valves, rings and pistons.  And these exclusive patented Turbulator Rings have proven themselves in protecting engines against water ingestion due to condensation.

Hardin Exhaust Systems are the overwhelming choice of boaters who want top-end performance with durability.  These exhaust systems deliver by allowing your engine to breathe easier and perform better.  Boaters spend thousands of dollars to modify their engines to increase horsepower and speed.  But, unless the exhaust system is capable of the additional flow required, the modifications are wasted.

Big Block Chevy Gil Replacement Manifolds

Sold in pairs and come complete with bolts, gaskets, and water inlet plumbing. These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

Big Block Chevy Gil Replacement Manifolds - Mercury Plumbing

Sold in pairs and come complete with bolts, gaskets, and water inlet plumbing. These exhaust systems allow center to center engine dimensions of 32-5/16" and are 1-5/8" taller than Mercury cast iron manifolds mounted on stock short decks with GM Heads.

SOLD IN PAIRS