304 Stainless Steel ’85-’01 CR500 “HORSEPOWER” Exhaust Manifold

Replaces OEM Part #’s 18352-KA5-691, 18291-ML3-791 and 18359-KA5-690


The 304 Stainless Steel ’85-’01 CR500 “HORSEPOWER” Exhaust Manifold. These exhaust manifolds are identical to the ever popular and dyno-proven, performance enhancing 7075 T6-511 exhaust manifolds, but are made with tougher 304 SS material.

Expect to see up to +3.9hp and +1.4lbft tq depending on your engine build.

These manifolds far exceed OEM and any other CR500 manifolds available anywhere. Don’t make the mistake and buy another manifold you will have to replace because of inferior fitment, lesser quality materials, or poor customer service .

A handful of other benefits are:

  • High temp FKM O-rings on the manifold spigot that seal the expansion chamber stopping the black drool that can leak on the OEM flange. This also allows easy pipe removal and install without having to re-seal.
  • There is the 4th O-ring on the back of the flange that eliminates the gasket, stopping the need to buy a gasket or scrape one off when doing top end etc.
  • All versions have a .500″ lead in taper in the exhaust port hole, on the flange side, allowing for larger exhaust port matching which could promote more power.
  • They look awesome.


Additional information

Weight 0.8 lbs
Dimensions 4 × 2 × 3 in



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OEM Part Number


43 reviews for 304 Stainless Steel ’85-’01 CR500 “HORSEPOWER” Exhaust Manifold

  1. Jimmy Pettit (verified owner)

    Easy to mount and seals nice

  2. Anonymous (verified owner)

    Cool product

  3. todd boyd (verified owner)

    We use them on outlaw karts and they last a long time

    Image #1 from todd boyd
  4. Tony Brown (verified owner)

    It bolted straight on and the goo is gone. A great product thanks Jason.

  5. Leo (verified owner)

    Very nice, very fast 🙂

  6. Berian Edwards (verified owner)

    A work of art !!! Shame it will be out of sight after fitting !!

  7. Charles b wheeler (verified owner)

    Great product

  8. Grant K. (verified owner)

    super quality product

  9. Rich Cordes (verified owner)

    Very well made

  10. Hanicque Emmanuel (verified owner)


  11. Derrick Lee (verified owner)

    Derrick Lee excellent product . You might want to consider replacing expansion chamber (pipe) when installing new flange . My old pipe had grooves worn into the throat of it . This may cause a poor seal !

  12. Jason S. (verified owner)

    The Stainless Steel is a must for racing, especially when racing outlaw karts * High Quality Design * Almost Completely Eliminates Black Sludge From Front of Motor

  13. Derrick Lee (verified owner)

    great product

  14. Franklin Knisley (verified owner)

    Went with more durable rather than lighter.

  15. Walter Wiggins (verified owner)

    Not installed yet but have one on my 01 CR500 and 89 CR500! This one going on 87 CR500 !!

  16. WAYNE C. (verified owner)

    This fit perfectly- finally got around to mounting it up and started the engine – no leaks! Thanks.

    Image #1 from WAYNE C.
    Image #2 from WAYNE C.
  17. Frank Homen (verified owner)

    Can’t wait to try it out.

  18. Robert R. (verified owner)

    Great product

  19. Raul C. (verified owner)

    Exceptional craftsmanship and excellent overall quantity.

  20. Aylwin Pierre-luc (verified owner)

    Super bonne qualité je le recommande 👍🏻

    Image #1 from Aylwin Pierre-luc
  21. Doug Prang (store manager)

    I got the trifecta of exhaust flange, water pump impeller and case saver. Excellent products and could not be happier. What a class act this company is!

  22. Scott Butler (verified owner)

    Great product

  23. Powell Steckel (verified owner)

    Fits great

  24. Daniel S. (verified owner)

    The parts were shipped within a day of the order and showed up quick.
    The machining quality and fit is very nice. Installation was easy. The bike runs great.
    I cannot comment on any performance gain. I have just redone the whole motor and suspension so the bike is a fresh beast.

  25. Ben (verified owner)

    Awesome product. I should’ve purchased this years ago. No more exhaust mess.

  26. William W. (verified owner)

    Gorgeous part.

  27. Albert Cassidy (verified owner)


  28. Cameron Griffin (verified owner)

    Very pleased with the stainless exhaust manifold. I definitely feel my 94’ CR500 rips harder and cleaner

    Image #1 from Cameron Griffin
    Image #2 from Cameron Griffin
    Image #3 from Cameron Griffin
  29. Thomas Gosch (verified owner)

    Great addition to any CR500 build

  30. Anonymous (verified owner)

    Jason you definitely have great product, seals perfectly no smoke or oil leaking at all. I believe it made me a little faster also😂
    Thanks again I definitely will be purchasing more products from you.

  31. Thomas D. (verified owner)

    Hey thx Perfect Job!

  32. Dillon Sedevcic (verified owner)

    Well machined,

  33. Donald T. (verified owner)


  34. Sandie Harris (verified owner)

    Great part

  35. Patrick Dayman (verified owner)


  36. Nathan Koogle (verified owner)

    This CR500 exhaust manifold is awesome!

  37. MICHAEL Allen (verified owner)

    The quality of the manifold is top notch! And it is nice to look at! Can’t wait to get it installed!

  38. stephane (verified owner)

    Very good craftsmanship, highly recommended

  39. Mark Niznik (verified owner)

    Top quality

  40. Kurt Pieper (verified owner)

    No more oil leak and perfect fit.

  41. Richard M. (verified owner)

    Nice piece and well engineered. Definitely a nice upgrade compared to the stock part it replaced.

  42. Scott G. (verified owner)

    Super nice stuff can’t wait to install

  43. jamie blogg (verified owner)

    Gone go real good with my hygge pipe.

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30 in stock (can be backordered)

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(43 customer reviews)