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Manley 12302-8 Race Flo SBC Intake Valve 2.020" +.100 8mm Stem for AFR Heads

Manufacturer

Picture for manufacturer Manley

Part Number

12302-8
12 reviews
Sale Price

$202.55

2 left at this price

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Usually delivered within 2 days

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Product Details

The Manley 12302-8 is a Race Flo / Race Master series intake valve designed for Small Block Chevy (SBC) engines equipped with AFR cylinder heads. With a 2.020" head diameter and a +.100" longer-than-stock overall length, this valve is engineered for high-performance bracket, drag, and oval track racing applications, as well as demanding high-performance street builds operating under 8,000 RPM.

Key Specifications:

  • Head Diameter: 2.020"
  • Stem Diameter: 0.3133"
  • Overall Length: 5.035" (+.100" longer than stock)
  • Seat Angle: Pro Flo 12° x 3/8"
  • Valve Tip Length: 0.260"
  • Head Style: 7° Dish
  • Seat Margin: 0.055"
  • Underhead Width: 0.100"
  • Weight: Approx. 108 grams

Construction & Features:

  • Manufactured from NK-842 stainless steel for superior durability and corrosion resistance
  • Chrome stems and hardened valve tips for enhanced wear resistance and longevity
  • Swirl polished underhead and fully machined combustion face to optimize airflow and combustion efficiency
  • Race Flo profile stem shape for improved flow characteristics
  • Recommended for alcohol engine applications

Important Installation Notes:

  • Compatible with Manley valve locks P/N 13098-16 (7°) or 13153-16 (10°) depending on your spring and retainer selection
  • AFR cylinder head guides are nominally sized to 0.3147"; Manley intake stem diameter is 0.3133" — guide sizing and clearance verification (machine work) is strongly recommended prior to installation

The Manley 12302-8 Race Flo intake valve delivers the precision engineering and durable materials required for serious performance and racing engines built around AFR small block Chevy cylinder heads.

Great prices! Had exactly what I was looking for, for $20 less than anywhere else even with the shipping cost added in.

Good

Very good so far

Good so far

As expected...

Quick and easy

Very fast response to order. Only place I could find the product I wanted.

Easy to do online

All good so far. Could be a little clearer about if the order will include needed any additionally needed hardware for install.

Great prices & fast shipping.

Lowest price on the net for what I purchased and received it within 3 days of placing order. Great website, great prices, & reasonable shipping charges.

In a rush to get my car up and running, Autoplicity had the best price on the items I needed, and in stock as well as shipped quickly. Just what I was looking for, thanks!

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