Product image 1U.S. SPEC MONKEY 19-22 Race GP-MAGNUM Stainless Full Exhaust, w/ Titanium Muffler
Product image 2U.S. SPEC MONKEY 19-22 Race GP-MAGNUM Stainless Full Exhaust, w/ Titanium Muffler
Product image 3U.S. SPEC MONKEY 19-22 Race GP-MAGNUM Stainless Full Exhaust, w/ Titanium Muffler
Product image 4U.S. SPEC MONKEY 19-22 Race GP-MAGNUM Stainless Full Exhaust, w/ Titanium Muffler

*Product may vary by application

U.S. SPEC MONKEY 19-22 Race GP-MAGNUM Stainless Full Exhaust, w/ Titanium Muffler

SKU: 121300U700

Regular price $559.00

Race Series Exhaust System


over $100


Repair Services

By filling out the form below you acknowledge that the item being purchased is for racing only and this vehicle will never be used on public roads or land.


The product that you are purchasing is designed and intended for closed course competition use only and is labeled as such, i.e. Yoshimura "RACE SERIES." Yoshimura RACE SERIES products are neither designed nor intended for use on PUBLIC ROADS or LAND. Such use is prohibited by Federal and State regulations.

I have read, understood, and agree to Use Restriction Terms.

(Payment Options Available at Check Out)


WARNING: Cancer and Reproductive harm - www.p65warnings.ca.gov

With the Monkey's late 60's early 70's retro styling, the GP-Magnum fits the bill for those builders and racers that only will settle for that classic Yoshimura JDM style.

There are two GP-Magnum mini systems available, both are handcrafted by our sister company in Asia for Yoshimura R&D exclusively for the US market. Both use stainless steel construction throughout the system with two sleeve options. Stainless polish finish or titanium that displays a one of a kind bluing effect and topped off with a old school Yoshimura badge.

The GP-Magnum removes over half the weight and replaces it with nothing but power, Yoshimura exhaust note and a retro feel that only Yoshimura delivers.

Nobody knows small bore like Yoshimura!

Yoshimura right side cover is available but sold separately.

Yoshimura GP-MAGNUM Titanium Muffler Full System weight: 4.9 Lbs. vs Stock Full system weight: 11.2 Lbs.

Know your product is the best. 

This product was designed specifically for your US spec. bike. Yoshimura R&D is the only authorized distributor in North America for our sister companies Yoshimura Japan (YJP) and Yoshimura Asia (YAT). We work with YJP/YAT to develop and test components that are less restricted versions than the choked-down systems which are required for more restrictive marketplaces like Japan and Europe. This imported product is specially configured for our marketplace and is not available in any other marketplace. In other words, you’re getting a custom exhaust made for the US market.

 What your missing if you don’t buy U.S. spec through us!

  • Made and marked for the U.S.
  • In-house warranty and technical support
  • Certificate of authenticity
  • Full 12-month warranty

. . . . .

This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product.

Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.

Vehicle Fitment

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    Race series product restriction and affirmation


    The RACE SERIES product you are purchasing removes, renders inoperative, or bypasses required elements of the emission control systems of EPA, certified motorcycles of motorcyle engines and may only be installed on motorcycles that are restricted to closed course competition. Installation of this product on a motorcyle that is ridden on a public street, highway, or public lands violates the tampering and defeat device provisions of the Clean Air Act & 203(a)(3)(A) and/or & 203(a)(3)(B) and may subject you to a civil penalty of up to $37,000.

    Information (Enter as Applicable)

    Race Information

    Rider/Purchaser Information


    By clicking below, I affirm:
    1. that i have read the above warning;
    2. that any information I have entered is accurate; and
    3. that any motorcycle on which I install the RACE SERIES product will be restricted to closed course competition and will not be ridden on any public street, highway or public lands.