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Glenwood Exhaust Systems - Tailpipes & Risers

Aluminum OT Pipes Pair
Starting From:
$579.99

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

Aluminum OT Pipes Pair

500-71 + Option(s)

Aluminum OT Transom Exhaust Pipes Pair

Available in two length sizes, these highly polished cast aluminum Over-Transom Exhaust pipes feature 3" outlets for maximum engine efficiency. (Fits header type exhaust manifolds only - will not fit a jet boat).


O2 Spacer, For Common Log Style Exhaust Manifolds
Your Price:
$99.95

O2 Spacer, For Common Log Style Exhaust Manifolds

620-32435

O2 Spacer, For Common Log Style Exhaust manifolds

This Unique 1" thick adapter plate provides an installation option for retro fitting a Oxygen sensor and or air fuel ratio gauge for tuning purposes Into the most common Log Manifold style exhaust systems. The part is manufactured from Aluminum and is not treated with any corrosion resistance. Designed to accept popular 18MM O2 Oxygen sensors.

TECH NOTE: Will O2 Sensors Work In marine exhaust systems?

YES FOR TUNING but they have limitations as water / moisture is a byproduct of combustion. Often boaters find there is moisture in their exhaust system that have collected or made their way inside of what is better known as the "DRY" exhaust stream of their exhaust system. Anything from steam like to little water droplets about 1/32" all around the inside of the exhaust. This is because water IS a by product of combustion. same thing you see on a cold morning behind cars. sometimes you see water dripping out.

Don't take our word for it ask a real rocket scientist: https://www.grc.nasa.gov/www/k-12/airplane/combst1.html

This is why O2 Sensors are great for tuning but have a limited long term life span unless protected by Catalytic converters like on New Marine engine offerings. So you know gas is known as a hydrocarbon based fuel. And we all know what hydro means WATER.

  • For Log Manifolds 
  • 5" Outside Diameter 
  • 3" Inside Diameter 
  • 1" Thick
  • 18MM O2 hole
  • 2-15/16" Bolt Hole to Bolt Hole (Adjacent)
  • 4-1/8" Bolt Hole to Bolt Hole (Across)
  • Mounting Hardware is NOT INCLUDED
  • Riser Gaskets sold separately (500-718) 2 Required
  • Stainless Steel 18MM Oxygen Sensor Plug sold separately (620-50031) 1 Required
  • Sold Each

Small Risers 9 3/4" x 10"
Your Price:
$599.99

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

Small Risers 9 3/4" x 10"

500-0715

Small Risers 9 3/4" x 10" (pair)

These are water cooled log style risers designed to bolt to log manifolds. These risers are available in two different sizes To help in fitting different applications. These small risers have a 2-1/4" exhaust inlet. These risers are made from cast aluminum


Stud Kit for O2 Spacer, For Common Log Style Exhaust Manifolds
Your Price:
$9.99

Stud Kit for O2 Spacer, For Common Log Style Exhaust Manifolds

620-32436

  • For Log Manifold O2 spacer 620-32435 
  • Includes 4 studs, 4  washers, and 4 nuts, all 5/16"

Large Risers 12" x 13"
Your Price:
$830.99

Large Risers 12" x 13"

500-0714

Large Risers 12" x 13" (pair)

These are water cooled log style risers designed to bolt to log manifolds. These risers are available in two different sizes To help in fitting different applications. These large risers have a 3" exhaust inlet port.


22 Degree Elbow Aluminum, Satin Finish
Your Price:
$289.95

22 Degree Elbow Aluminum, Satin Finish

620-23800

22 Degree Elbow Aluminum, Satin Finish (Sold in Pairs)

These popular exhaust elbows perfectly finish any log style exhaust system. Fits 2-7/8" or 3-1/2" hose.


Log Riser Stainless Steel Stud Kit For Pair Of Manifolds
Your Price:
$21.99

Log Riser Stainless Steel Stud Kit For Pair Of Manifolds

620-09116

Log Riser Stainless Steel Stud Kit For Pair Of Manifolds

This stud kit is used for attaching the log riser to the log manifold. Theirstainless steel construction will provide long life and resist corrosion Kitincludes: (8) studs, (8) washers, (8) nuts. Studs are 5/16-18" and 1-3/4" long.