My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Manley 11263-1 Severe Duty Gen II Exhaust Valve 1.940 in. Head Diameter

(2009-2011 BMW 3 Series 4DR)

Manufacturer

Picture for manufacturer Manley

Part Number

11263-1
10 reviews
Sale Price

$56.48

Out of Stock

Notify me when available
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Manley 11263-1 is a Severe Duty Gen II exhaust valve featuring a 1.940-inch head diameter, purpose-built for high-performance and racing engine applications. Part of Manley's renowned Severe Duty lineup, this valve is manufactured from XH-428 stainless steel — a material engineered to deliver superior strength at extreme operating temperatures encountered in performance and racing environments.

Key Features:

  • Head Diameter: 1.940 in. (maximum)
  • Stem Diameter: 0.342 in.
  • Overall Length: 6.417 in. (maximum)
  • Material: XH-428 high-strength stainless steel (exhaust)
  • Chrome-coated stem for reduced friction and extended guide life
  • Hardened valve tip for durability under aggressive cam profiles
  • Swirl-polished underhead area for improved exhaust flow
  • Fully machined combustion face for precise sealing
  • Gen II blank design — customizable to exact length, groove position, and head specifications

Manley Severe Duty exhaust valves are fatigue-tested at 40,000 psi and 1,400°F, proven to endure up to 100 million cycles — making them a reliable choice for naturally aspirated, forced-induction, and nitrous-fed applications. The Gen II platform allows the valve to be built to your exact engine specifications, offering flexibility for custom engine builders and serious racers alike.

Sold individually (1 valve). Confirm head diameter, stem diameter, and overall length requirements before ordering to ensure proper fitment for your cylinder head application.

Products specifications

Fits

2009-2011 BMW 3 Series 4DR

Wow!! I came across Autoplicity while searching for a fuel pump for my Trans-Am. Not only did they have the cheapest price for the part, but they also had extremely reasonable shipping cost. Most websites claim to have free shipping but it seemed the cost of shipping was added to the cost of their part. Then I find out my order was processed and shipped within one business day!! I'll definately be bookmarking Autoplicity's home page!! Thanks!!

Bought some wire looms for my Chevy from them. Great price, service, and shipping speed!

The item arrived fast and in good condition. There however seems to be a glitch with the scale the first time we weighed something. After we shut it off and then back on it seemed to be OK.

I ordered a Grant 1103 Steering Wheel, Order Number: 16767. Great prices, quick shipping, good customer service, an all around deal. Thank you.

The part I purchased had the lowest price I could find online anywhere.. Simple transaction and fast shipping.. Ordered on a Monday and delivered by Friday..

Great selection and after checking multiple site (>10), Autoplicity was the on site that had the item I was searching for. I was extremely pleased with selection and service.

It has been a smooth and easy process. I would definitely use them again.

Great Prices and Very Fast Shipping. Will order again in the future. Customer Service was great when I called about a question with my order.

Great prices and fast delivery.

best prices around !! Shipping was FAST !

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy