Water Injected Headers - Accessories for Water Injected Headers

Tunable Stainless Steel Header Water Pressure T-Valve

The Hardin Marine T-Valve is a spring/ball style water flow check valve designed to control the flow and time of release of the water into water injected exhaust headers thus rendering the headers dryer and hot at an idle when properly adjusted and allow water flow at the appropriately tuned higher engine RPM's.

By adjusting a boats water inlet or exit you can control the water pressure that is feed to the T valve. The unique advantage of the Hardin Marine tee valve is that it features threaded exits ports. This thread allows use of optional brass tuning jets (Sold Separately) for additional control of the amount of water flow you may desire for your particular application.

The optional brass water jets are available with a 0.100 orifice and can be drilled out to allow additional water flow if so desired. This T-Valve accepts 2 brass water jets. The 316L premium grade stainless steel tee valve features -8AN or (3/4X16UNJ thread) connections. Also replaces #BR-TVALVE-73.

Restrict your water flow as necessary with these Restrictors (Sold Separately). NO LONGER will you need to drill and tap fittings for water restriction!

Check Ball and Spring For Header Water Pressure T-Valve

These are the internal components to the Header Water Pressure T-Valve Both parts are manufactured from stainless steel

Replacement T-Valve Ball

Designed to fit 210-16123 T-Valve. Also used in Hardin Sand Strainers.

HP Spring For Header Water Pressure T-Valve

This stainless steel spring is designed to open up the T-Valve at a 12 PSI rather the 6 PSI of the standard spring that comes is Pressure T-Valves. Used in HP applications.

Brass Water Injection Fittings For Headers

Fittings are:
• 1/8" NPT by -3 Thread

These are replacement water injection fittings designed to screw into each header tube so that you can attach the water injection lines.
This part is sold as a package of 8

This .100 jet is used when you just have to much water flow going to your headers. Can be drilled out to larger size. This jet will limit flow. The jet is installed by threading into pre-threaded Hardin Tee Valve.

Note: This is designed to fit Late Model Hardin Marine Pressure Tee Valve, otherwise you will have to drill and tap your fitting to accommodate. 7/16"-28 Thread. The Hardin tee value uses 2 of these, they are Sold Each, NOTE Photo is not the exact product, just an approximation.

Brass Water Injection Fitting For Headers

Fitting is:
• 1/8" NPT by -3 Thread

These are replacement water injection fittings designed to screw into each header tube so that you can attach the water injection lines.
This part is sold each.

Replacement Header Lines for Most Water Injected Headers

These are replacement water injection lines designed to work as replacements for missing or damaged lines on most water injected header applications on 8 cylinder engines. These kits include easy bend cupronickel tubing with a centrally mounted intake block. Each intake block contains 4 ports for each individual line and a female 1/2" NPT port for water intake from your pressure T-Valve (adapters sold separately). The kit includes 4 short, 4 long lines, 2 intake blocks and 8 fittings for the intake blocks. This will allow for building replacement lines on 2 headers or 1 engine. Header mounted fittings are not included. Please note: This is a do it yourself kit, you will have to bend the tubing to the appropriate shape for your headers. Returns will not be accepted on any kits with bent tubing.

• Polished Billet Aluminum Construction.
• 1/4" NPT female pipe thread on the inlet and outlet.
• Easy Manual Control of water flow through headers.
• 4 Positions.

4" Hi-Performance Silencer For Water Injected Headers

These high performance silencers feature large stainless packed louvered design cores for maximum performance through a muffler system They are ideal for blown or high compression engines.

They are 10-1/2" long and slip in a 4" header collector Best suited for higher horsepower applications.  Sold in pairs.

4" HIPO Muffler For Water Injected Headers

The HIPO High Performance Muffler is designed to tone down the beast in your motor without the loss of major horsepower. It reduces the noise to the low 90 decibels with an idle at 800 RPMs in motors up to 600 horsepower with a loss in horsepower of only 1% -2%. Made from 100% Stainless Steel. Easy installation; just attach one bolt and you are ready to go. Originally designed for blower motors and is now being used in all size motors. So, Tame the Beast and Still Feel the Power.

100% Stainless Steel Hollow Louvered Core with Stainless Steel Wool.  Decibel: Stock to 600 hp in low 90 decibels with idle at 800 RPMs.  Mufflers are 3-7/8" O.D x 10-1/2" long.  Fits in 4" and belled 5-1/8" x 16 gauge Collectors.  Does not fit on 4" x .083" 14 gauge wall tubing.  Installation Kit included; two bolts, two spacers, two washers, and two nuts to attach both mufflers.  Two Mufflers per set .

4" Stage 1 HIPO Muffler For Water Injected Headers

The Stage 1 Silencer Muffler is a state of the art design developed with years of testing to quiet high performance motors in order to meet the new stringent sound regulations. The Stage 1 Silencer is designed to keep you on the lake without loss of major horsepower. It reduces noise to the low 80 decibels with idle at 800 RPMs in motors up to 600 horsepower with a loss in horsepower of only 3% - 5%. Made from 100% Stainless Steel. Easy installation; just attach one bolt and you are ready to go. So, Stay on the Lake with Power to Spare.

• 100% Stainless Steel.
• Decibel: Stock to 600 hp in low 80 decibels with idle at 800 RPMs
• Works with higher horsepower motors, but decibel levels may increase
• Perforated Tube with Internal Baffle, Packed with Stainless Steel Wool
• Mufflers are 3-7/8" O.D. x 10-1/2" long
• Fits in 4" and belled 5-1/8" x 16 gauge Collectors
• Does not fit on 4" x .083" 14 gauge wall tubing
• Installation Kit included; two bolts, two spacers, two washers, and two nuts to attach both mufflers
• Two Mufflers per set
  

Small Block Chevy Adapter Plate Header Gasket Kit

This gasket kit, made by Hardin Marine is used with Small Block Chevy Lightning Headers, or Over Transom Headers such as Bassett or Rewarder Headers. When replacing the gaskets on these applications you'll need this and a standard Small Block Chevy Exhaust Gasket, so we created a kit package that includes all four gaskets. These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time.

Small Block Chevy Adapter Plate Header Gaskets

These gaskets, made by Hardin Marine are used with Small Block Chevy Lightning, Bassett or Rewarder Headers adapter plates. When replacing the gaskets on a Small Block Chevy Basset or Rewarder Header, you'll need this and a standard Small Block Chevy Exhaust Gasket. These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time. Sold as pairs.

Small Block Chevy Adapter Plate Kit with Header Gaskets

This adapter plate and gasket kit, made by Hardin Marine is used with Small Block Chevy Lightning Headers, or Over Transom Headers such as Bassett or Rewarder Headers. When replacing the adapter plates and gaskets on these applications you'll need these plates, adapter gaskets and a standard Small Block Chevy Exhaust Gasket, so we created a kit package that includes all four gaskets and the plates. These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time.

Small Block Chevy Header Gaskets

These gaskets, made by Hardin Marine are used with Small Block Chevy Lightning Headers, and over transom headers such as Bassett or Rewarder Headers. These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time. These gaskets have round ports for use with headers. Sold as pairs.