Cyclone Exhaust Systems - Replacement Parts for Cyclone Exhaust

Cyclone "Shorty Header"
Your Price:
$3,999.99

Cyclone "Shorty Headers" for Big Block Chevy

620-32001

Cyclone "Shorty Headers"
Replacement Header For Gil Marine, Mercury Hi-Performance & Rex Power Torque Manifolds
Fully Polished Finish

Do your performance manifolds look like these but your stainless steel tailpipes still look like jewelry?  This is a common problem with a number of aftermarket high performance exhaust manifolds, the solution is to replace them with the Cyclone "Shorty"! An all 316L stainless steel header designed as a direct bolt-on replacement for your cast aluminum manifolds. 

By retaining your existing stainless steel tailpipe or riser, you can remove your existing manifolds and simply slide the new "Shorty Header" into place and connect your existing tailpipes.  These units are currently available to replace Mercury Hi-Performance, Gil Marine, and Rex Marine Power Torque manifolds.  Each header is manufactured to the highest quality standard using 100% 316L stainless steel construction, laser machined flanges for a perfect gasket seal, and exhaust tubes that are B.T.B. bent to exact tolerances every time.  A fully welded computer designed water inlet manifold assures equal water flow to each individual exhaust tube.  These headers are completely annealed to maximize durability while preventing corrosion.  CAD-5 technology was used to develop the staggered length exhaust tube runners which provide for broader low and mid range torque, while yielding incredible peak power. This kit comes complete with all necessary bolts and gaskets to attach to your engine. Riser gaskets are not included, and you may need up to 4 gaskets depending on application. See related parts.


Cyclone 525 Standard Dimension Tailpipe - Polished
Your Price:
$1,975.99

Cyclone 525 Standard Dimension Tailpipe - Polished

620-32335

Cyclone 525 Standard Dimension Tailpipe - Polished

This tailpipe is used on Cyclone manifolds that are adapted to MerCruiser® 525 engines. It's unique design requires additional hatch clearance in some applications. Consult for information regarding correct fit.

Sold in pairs

 

Additional Information:


Extreme Duty Hi-Performance D Port Exhaust Manifold Gaskets - 454/502/8.2L Chevy
Your Price:
$59.99

Extreme Duty Hi-Performance D Port Exhaust Manifold Gaskets - 454/502/8.2L Chevy

300-1417

Extreme Duty Hi-Performance D Port Exhaust Manifold Gaskets - 454/502/8.2L Chevy - Sold in Pairs - Replaces OEM Mercury #27-8M0065690

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need. These gaskets are designed to be used in D port Exhaust applications. Replaces stock OEM Mercury #27-8M0065690

Sold in Pairs


Manifold To Riser Water Transfer Hose
Your Price:
$39.99

Gil Big Block Chevy Replacement Manifold Install Kit

420-900006

  • Fits Hardin, Hardin Marine, Power Torque and Mercury Hi-Performance
  • Replace your worn out hoses, or have a spare on hand!
  • 1" Inside Diameter
  • 6-1/2" Center to Center

Replacement Cyclone Series Big Block Chevy Manifold Install Kit
Your Price:
$69.99

Replacement Cyclone Series Big Block Chevy Manifold Install Kit

620-32515

This kit contains the fittings and bolts to install a pair of manifolds on a big block Chevy Cyclone exhaust system.


Replacement Cyclone Series Big Block Chevy Riser Install Kit
Your Price:
$79.95

Replacement Cyclone Series Big Block Chevy Riser Install Kit

620-32520

This kit contains the fittings, gaskets and bolts to install a single riser on a big block Chevy Cyclone exhaust system.


Gil Manifold Riser Stud
Your Price:
$7.25

Gil Manifold Riser Stud

420-100

Gil Manifold Riser Stud

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 454/502 Chevy
Your Price:
$29.99

Extreme Duty Hi-Performance Seaward / Cyclone Exhaust Manifold Gaskets - 454/502/525 Chevy

300-1413

Extreme Duty Hi-Performance Seaward / Cyclone Exhaust Manifold Gaskets - Stock Square Port 454/502/525 Chevy - Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. Double drilled for both standard BBC and 525 applications. These gaskets are designed to be used with Hardin Marine's Seaward / Cyclone Exhaust Manifolds. Will work on other Big Block Chevy Manifolds as well. 

Sold in Pairs


3/8 AN Washer SS
Your Price:
$1.15

3/8 AN Washer SS

90037AN-STSS

3/8 AN Washer SS

12 Point Zinc Header Bolt for Cyclone Exhaust
Your Price:
$2.00

12 Point Zinc Header Bolt for Cyclone Exhaust

900-37C100HBZ

12 Point Zinc Header Bolt for Cyclone Exhaust, 3/8" Bolt, 1" Tall

1/8" NPT Brass Pet Cock Drain
Your Price:
$3.95

1/8" NPT Brass Pet Cock Drain

900-1000

1/8" NPT Pet cock drain used on Cyclone Headers and other applications

Stainless Steel 3/4" NPT Male To 1" Hose Fitting
Your Price:
$15.99

Stainless Steel 3/4" NPT x 1" Hose Fitting

540-222110

Straight 3/4" NPT Male To 1" Slip-On Hose Barb

We Offer the most complete line of custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


90 Degree Stainless Steel 3/4" NPT Male To 1" Hose Fitting
Your Price:
$25.99

90 Deg. Stainless Steel 3/4" NPT x 1" Hose Fitting

540-222120

90 Degree 3/4" NPT Male To 1" Slip-On Hose Barb

We Offer the most complete line of custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


3/4" NPT Stainless Steel Pipe Plug
Your Price:
$16.99

3/4" NPT Stainless Steel Pipe Plug

540-222999

316L Stainless Steel Fitting
3/4" NPT Pipe Plug

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


Steam Fitting, Gil/Hardin Manifold
Your Price:
$39.99

Steam Fitting, Gil/Hardin Manifold

420-910331

Steam Fitting, Gil/Hardin Manifold

Replacement fitting.

4.0" Offshore Turbulator
Your Price:
$41.95

4.0" Offshore Turbulator for Gil Replacement, Mercury HP500, Cyclone, Replaces OEM #816037

420-907060

4.0" Offshore Turbulator, Replaces Mercury OEM #816037

Turbulators are designed to keep any condensation or moisture from entering the manifold during the cool down process. This is one of the many unique Hardin features that are helping lead the way in exhaust system technologies. Replaces Mercury #816037. Used with Gil  Style Manifolds and risers.


Hardin Manifold to Riser Gasket
Your Price:
$12.99

Hardin Manifold to Riser Gasket - Mercury 27-848147

420-906321

Hardin Manifold to Riser Gasket, Replaces Mercury OEM# 27-848147

Fits: BBC, SBC and Ford manifolds as well. For Gil Replacement, Mercury HP500 and Cyclone Manifold applications.

Original quality Hardin gaskets are the finest anywhere Their graphite impregnated core assures long life. Depending on application up to 2 or 4 may be required on a single engine. When using a turbolator (See related parts) 4 are required.


Stainless Steel Worm Gear Clamps
Starting From:
$2.99

This Part has options, please click the button below to order.

Stainless Steel Worm Gear Clamps

100-720- + Option(s)

Standard Duty Stainless Steel Worm Gear Clamps

These are NOT cheap automotive-style band clamps They are a 100% stainless steel band, clamp, and screw. These clamps are designed to give years of trouble-free service. Don't trust anything but the best for your boat.

  • 100-720-6306, use with 3/8" fuel hose
  • 100-720-6310, use with 5/8" fuel hose
  • 100-720-6312, use with 3/4" water hose
  • 100-720-6316, use with 1" water hose
  • 100-720-6320, use with 1-1/4" and 1-1/2" Water hose
  • 100-720-6328, use with 1-5/8" water hose
  • 100-720-6336, use with 2" fuel hose
  • 100-720-6352, use with 2-7/8" and 3" Exhaust hose
  • 100-720-6372, use with 4" Exhaust hose
  • 100-720-6396, use with 5" Exhaust hose

Gil Manifold Rise Stud Nut
Your Price:
$1.95

Gil Manifold Rise Stud Nut

900-37CNFNSS

Gil Manifold Rise Stud Nut

Gil Manifold Riser Stud Washer
Your Price:
$0.75

Gil Manifold Riser Stud Washer

900-37SASTSS

Gil Manifold Riser Stud Washer