Frequently Asked Questions

(Please email us for further information should you require at enquiries@blowexhausts.com)

 

1Q: WHAT IS INCLUDED IN THE EXHAUST KIT?

1A: Everything you need is in the kit except: Baffles are optional, most guys don’t get them. If you choose to purchase later, they only take 5 minutes to install. & Use your existing Flange and C-Clips from your current exhaust, we supply new gaskets in the kit.

 

2Q: WHAT PAYMENT METHODS DO YOU ACCEPT?

2A: We accept PAYPAL & Secure Credit/Debit Card payments and AFTERPAY in AUSTRALIA

 

3Q: HOW LONG DOES IT TAKE TO RECEIVE MY ORDER?

3A: Usually 7-10 working days, we ship air express.

 

4Q: DO YOU SELL GLOBALLY?

4A: Yes, we do, we currently have warehouses in Australia &, North America and ship globally to most countries. Delivery is approximately 7-10 working days.

 

5Q: DO I NEED A PROFESSIONAL MECHANIC TO INSTALL THE EXHAUST SYSTEM? DOES THE KIT COME READY TO INSTALL?

5A: We recommend they be fitted by a reputable motorcycle service centre; the bike will require tuning once the exhaust is fitted. If you have a strong knowledge of motor mechanics you will find it extremely simple and quick, usually under 20 minutes to install. Please read our “Installation Guide” as well as our “Kit Includes” section of this website

 

6Q: DOES THE PRODUCT COME WITH WARRANTY?

6A: Yes, we stand behind our performance product and provide a 24-month warranty, please refer to our Terms & Conditions for details.

 

7Q: WHAT MODELS DO THEY AND DON’T THEY FIT?

7A Blow Performance Exhausts are designed and manufactured for ALL EVO & TWIN CAM 80 CI – 131 CI ENGINES from 1983 ONWARDS. and MILWAUKEE-EIGHT 107 CI - 131 CI ENGINES 2017 ONWARDS. Soon available Sportster Models!

 

8Q: DO BLOW PERFORMANCE EXHAUSTS INCREASE PERFORMANCE?

8A: Yes, Blow Performance Exhaust Systems are 3-Step Headers and not to be confused with straight through drag pipes. Installed correctly and with a sports air cleaner & professionally Dyno Tune, our 3-step header system will increase power & torque by dramatically increasing the scavenging effect with your engines. Please read our “ABOUT” section in this website.

9Q: ARE THE STANDARD & PRO PERFORMANCE EXHAUST BAFFLES EASY TO INSTALL OR REMOVE?

9A: Yes. Under 5 minutes! You will need to retune your engine each time you install or remove baffles.

 

10Q: ARE BLOW EXHAUST SYSTEMS LEGAL AND ARE THEY LOUDER THAN OTHER AFTER MARKET PERFORMANCE EXHAUSTS SYSTEMS?

10A: No Aftermarket exhaust systems are street legal, that includes the big brand names as well. Blow Performance Exhausts are designed for closed circuit use and not for street. In most territories without the Standard Exhaust Baffles or Pro Performance Baffles they would not meet EPA regulatory Levels however, Blow Performance Exhausts Systems are shipped worldwide and not all countries restrict race production equipment for street use. Please check your respective EPA Regulatory Authorities for compliance levels.

 

11Q: DO YOU OFFER DISCOUNT FOR TRADE?

11A: Yes, please contact us at enquiries@blowexhausts.com for further details.

 

Performance Exhaust Systems H-D EVO-BIG TWIN CAM 1984-2017 & Milwaukee-Eight 2017-Current All Models. BREAKOUT, SOFTAIL, FAT BOY, FXDR, DYNA, FAT BOB, STREET BOB, SPORTS & TOURONG & MORE. Global shipping from US & Australia Warehouses. 
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Additional information
Performance, with a distinctive deep Harley-Davidson sound.
Our qualified engineers have worked with some of the biggest names in competitive racing. With racing you must get it right every time. The design, materials and coatings are everything and if you can make the exhaust system perform, look, and sound amazing then you have nailed it.
Blow Performance Exhausts has a design and development team with over 50 years’ experience in performance engine work.
The team has supplied Industry White Papers such as “The Misunderstanding of Back Pressure”, “Reversion the Myth of Back Pressure” for Harley-Davidson Workshops and Bike Builders world-wide.
Our product is metallurgically sculptured both externally and internally with the highest quality metals, materials, and coatings to resist faults, corrosion, and overheating.
We specifically design and manufacture for Harley-Davidson Big V’s. Our focus and dedication are purely for this market.
Our 3-Step exhaust systems are designed to work with the exhaust inertia pulse and give a broad power band on 80ci -131ci EVO & Twin Cam Engines as well as 107ci – 131ci Milwaukee Eight Engines. Blow Performance Exhausts are 3-step headers and NOT to be confused with straight drag pipes.
Our product dramatically improves horsepower and torque with an amazing sound, the ultimate rock band of exhaust sound. Customers compare the deep note to a V8 speed boat in water and V8 hot-rods.
We also offer a selection of performance baffles for those that require a softer sound and still have that distinct Harley-Davidson throb. Our 3-step headers are designed for performance and are at their best without collectors, mufflers, or baffles.
Available in 3 Layered Showroom Chrome and high temperature resistant Ceramic Matte Black exhaust pipes, with a choice of Showroom Chrome, Ceramic Matte Black, and Solid Rose Gold Copper heat shields.
DIFFERENT BETTER
Blow Performance Exhausts first primary length is close to the exhaust port. This prevents a sudden drop in velocity due to a volume increase from head port to exhaust tube, the first step helps prevent reversion, giving power at low RPM's. Steps placed further down the pipe create pressure drops in the flow of the gases and increase power at mid and higher RPM's.
Specifically designed and calibrated for piston to valve synchronization, the pressure wave begins to travel down the tube. When it reaches the end of the tube it reverses as a vacuum wave and comes back towards the cylinder. Our tuned headers time that wave to hit right around the closing of the exhaust port, this boost scavenges residuals out of the cylinder while the intake begins to fill. (Scavenging is the effect generated by harnessing the inertial energy of a high velocity exhaust gas pulse.)
The best performance exhaust system has no back pressure. This is misunderstood and confused with the pressure wave. A high velocity pulse of exhaust gas carries energy, as the pulse moves through space it displaces the following volume behind it. This generates a low-pressure zone like a weak vacuum. Scavenging effect is created, and a low-pressure area is left in the vacated cylinder ready for the incoming intake charge.
DYNO TUNING AND TUNERS
We do not supply map settings for our exhaust systems as no two engines are the same hence, for maximum performance we encourage having your engine dyno tuned after installation by a professional dyno tuner. Every time you change air-cleaner or exhaust you need to retune your engine.
Aftermarket Tuners are not needed; however, you can install any of the top branded products. What is important when using Blow Performance Exhausts is a performance air-cleaner and dyno tuning after installation. Air in and out with the right mix in the middle makes all the difference.
DISTRIBUTION
We distribute to 35 countries from our USA and Australian warehouses.
WARRANTY REPLACEMENT
2 years full replacement policy. We currently boast a 1.8% failure rate, this includes customer incorrectly installing our exhaust systems.
Blow Performance Exhausts is an Australian Company. We manufacture Harley-Davidson performance exhaust systems for closed course competition. Please check your local EPA authorities for street use.
CONTACT
All communications to the Australian office.
enquiries@blowexhausts.com
+61 431 016 786
FACEBOOK @blowexhausts
INSTAGRAM @blowperformanceexhausts

 

 

HARLEY DAVIDSON AFTERMARKET PERFORMANCE EXHAUSTS SYSTEMS

COMPATIBLE WITH

EVO AND TWIN CAM 80CI TO 131CI ENGINES 1983 ON

MILWAUKEE - EIGHT 107CI TO 131CI ENGINES 2017

SPORTSTER 883CC TO 1200CC ALL MODELS 1986-2021

Manufactured for closed course competition. Please check your local EPA authorities for street use.

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