• Big Bore Kit
• Big-bore bolt-on kit increases 114"/117" with 4-1/2" stroke M-Eight to 128" with no case machining required
• 4-1/4" bore cylinders with 11:1 forged pistons
• Oil Pump/Cam Plate
• S&S oil pump/cam plate with blue anodized finish
• Passage plugs are removable for servicing
• Independent scavenge sections for flywheel cavity and cam chest
• Debris screen in both scavenge pickups
• Magnet in cam chest to help prevent debris from entering the oil pump
• Increased oil flow capacity on both the oil feed and scavenge side
• Adjustable pressure relief valve can be adjusted with the unit installed in the engine
• Pushrods
• Quikee pushrods with chrome pushrod tubes
• Tappets
• S&S premium tappets
• Tappet Cuffs
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• Improve tappet stability in high-lift, high-rpm situations
• Cam
• S&S 550 cams designed for big bore applications
• Valve Springs
• S&S valve springs work with cams up to .605" lift
• High-performance conical single-wire spring design
• All necessary gaskets, bearings and hardware for bolt-on installation is included
• Made in the U.S.A.

NOTE: Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.

SHIPPING POLICY

For US customers, we offer 3 shipping options:

• Free shipping for orders over $69. This shipping option takes 5-8 business days.
• Economy for small orders (less than 1lbs) $6.99
• This shipping option takes 5-8 business days. 
• Standard shipping (FedEx / UPS) for all orders $9.99 
• This shipping option takes 1-5 business days. 

*Most Arrow exhausts  ship directly from Italian warehouse!

It typically arrives at our store within 1-2 weeks, and then we'll ship it out to you right away!

*Most of M4 and Empire exhausts Due to high volume of sales, lead time could be up to 5-20 business days before shipping.

We are currently unable to offer   overnight or 2-day guaranteed shipping .

This is because the warehouses of most of our suppliers only ship Ground.

Products ship from our Miami facility or drop ship direct from our Suppliers

Orders placed before 11am CST are typically will send the same day. 

Most orders placed after that time are will send the following business days. 

If you have specific shipping requests or needs please contact us at sales@bills-exhausts.com prior to purchasing and we will do our best to assist you.

If an item is back ordered from the manufacturer you will be notified by us. FYI – We don’t like it when this happens any more than you do.

We will try and help as best we can with back orders

A TRACKING NUMBER will be send to you via email or text after purchasing .

SHIPMENTS WITHIN THE U.S.

FREE STANDARD SHIPPING  on orders over $69 is available in all US lower 48 states, APO addresses, and Puerto Rico via USPS or UPS.  (*Exceptions apply for Alaska and Hawaii.)

Free standard shipping means we will select an option that gets you your parts as soon as possible while still being economically priced.

We reserve the right to deny free shipping for any reason.

About pre-orders:

When you order  PRE-ORDER it  means that you can purchase it before the official release date and then, you just wait for the shipping Usually pre-orders takes from 1-6 weeks depending the brand and the product. 

Contact us when ordering or we will contact you to go over rates and times.

INTERNATIONAL SHIPMENTS

WE SHIP WORLDWIDE Shipping rates outside the US are based upon destination and weight. 

Canada ,European Union and Puerto Rico Fast shipping with DHL Prepaid Customs/Taxes (DDP)

• * Countries we don't collect  tax or duties required pay by you.

Please note that we are unable to ship oversized items such as tires, batteries, and oils internationally.

For these items, we offer Large Truck Load (LTL) freight shipping.

Please be aware that LTL shipping costs may vary and exceed the estimated amount at checkout.

We will contact you for confirmation before processing your order.

If you have questions about these fees or duties contact us prior to ordering and we can assist you.

 -For international orders, customers who refuse the package will not receive a refund for the original shipping cost. Additionally, any return shipping fees incurred by us will be deducted from the customer's refund

 -Tires are not eligible for return.

 -Electronics are not eligible for return.

More for Return policy here

Delivery times for international shipments are typically 5 to 9 business days, but this can vary depending on your country’s customs procedures.

Orders delayed by customs are not something we can control or change.

ALL international orders (Includes CANADA ,California and Puerto Rico) needed to be ship from our location in Miami Florida.

Most of International orders cannot drop ship from supplier's warehouses(Except on some specific Brands)

Parts typically take 2-7 business days to arrive at our warehouse.

Once they're in, we'll send you a tracking number.

The estimated delivery time shown at checkout begins once the part is shipped from our warehouse