Hells Gate Hot Rods

(208) 305-6469

Browse Categories
  • BOMBER STYLE SEATS
  • CHASSIS/SUSPENSION
    • COMPLETE CHASSIS
    • RIDE CONTROL
    • SUSPENSION KITS
  • DOOR PANELS
  • DRILL GUIDES
  • ENGINE COMPONENTS
    • ACCESSORY DRIVES
    • CARBURETORS
    • MOTOR MOUNTS
    • VALVE COVERS
  • EXHAUST KITS & ACCESSORIES
    • LAKE HEADER KITS
      • HEADER KITS (U-WELD)
        • STRAIGHT LAKE HEADER KITS
        • SWEPT LAKE HEADER KITS
    • LAKE HEADER ACCESSORIES
      • DUMP TUBES & TURNOUTS
      • LAKE HEADER CAPS & BLOCKOFFS
  • MEGAPHONES, TRANSITIONS, COLLECTORS
    • FORMED MERGE COLLECTORS
    • MEGAPHONES
  • FLANGES
    • CARBURETOR FLANGES
      • 1 BARREL
      • 2 BARREL
      • 4 BARREL
    • COLLECTOR/UNIVERSAL FLANGES
      • 3-BOLT COLLECTOR FLANGES
    • EXHAUST/HEADER FLANGES
    • INTAKE FLANGES
    • ONE-PIECE EXHAUST/INTAKE FLANGES
    • TURBO FLANGES
  • INTAKE KITS & ACCESSORIES
    • FULL-WELDED INTAKES
    • INTAKE KITS (U-WELD)
  • MANDREL BENDS
    • COLD-ROLLED STEEL
  • PEDAL ASSEMBLIES
  • PLASMA TRACER
  • Products
  • Builds
  • Services
  • About Us
    • Customer Reviews
    • In the Media
  • Blog
  • Contact Us
    • Contact Form
    • Events
Login / Register
0 Wishlist
0 items / $0.00
Menu
Hells Gate Hot Rods
0 items / $0.00
Sold out
Cadillac Big Block 425-500 Intake Flange
Cadillac Big Block 425-500 Intake Flange
Cadillac Big Block 425-500 Intake Flange
Click to enlarge
Home Products Tube Size 2" Cadillac Big Block 425-500 Intake Flange
Cadillac 331-429 Intake Flange
Cadillac 331-429 Intake Flange $62.00
Back to products
Mopar Slant 6 170-225 Intake Flange
Mopar Slant 6 170-225 Intake Flange $62.00

Cadillac Big Block 425-500 Intake Flange

Rated 4.60 out of 5 based on 5 customer ratings
(5 customer reviews)

$82.00

Out of stock

Compare
Add to wishlist
SKU: 002-0045 Categories: 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 2", 425, 472, 500, Cadillac, Engine Size, Flanges, Intake Flanges, Make
Share:
  • Description
  • Additional information
  • Reviews (5)
  • Shipping & Delivery
Description

Includes one pair of intake flanges for the Big Block Cadillac 425, 472, 500 hot rod motor (see motor applications below).  These flanges are cut with a CNC HD (High Definition) Plasma cutter out of 3/8” Pickled and Oiled (P&O) steel.  P&O material is hot rolled steel that has been dipped in acid to remove the mill scale and then lightly coated with oil.  The end result is less work to clean off the mill scale as needed with hot rolled mild steel.

 

Motor Application:

Big Block Cadillac

            425 cu. in (1977-79)

            472 cu in (1968-74)

            500 cu in (1970-76)

            *more applications/years may work, verify before purchasing.

 

Ports designed to be used with 2” exhaust tubing.

 

In addition to the pair of flanges, you also receive 12 custom machined angled spacers from DOM tubing.  These spacers will allow the bolts to be threaded into the heads while allowing the bolt head to apply even pressure to the intake flange.  These spacers come loose, unwelded but can be tacked in place once you build the intake.  This listing does not include the metal to cover the lifter valley of the motor but can be easily fabricated using flat plate.

 

We are the only manufacturer of intake flanges for this motor.  Now you have the ability to build your own custom intake!

 

These flanges are designed in CAD and are test fit on an actual head to make sure proper fitment is achieved.

Additional information
Weight 3.62873896 lbs
Dimensions 4 × 20 × 4 in
Reviews (5)

5 reviews for Cadillac Big Block 425-500 Intake Flange

  1. Rated 5 out of 5

    Max Mellon (verified owner) – May 17, 2022

    great service and product thank you

  2. Rated 4 out of 5

    Steven (verified owner) – July 6, 2019

    There was an error in the tracking number given when the order was shipped, and so I couldn’t follow the order and I began to wonder if it had gotten lost, but once I brought it to Andy’s attention, he quickly corrected the error and I was able to track my order until it arrived. I did have to do a bit of filing on a couple of holes so that I could get the flange to bolt on easily. Not a big deal, though, as the flange was well made, 3/8″ thick, and perfectly flat. I would certainly order again if I needed something that HGHR sells.

  3. Rated 5 out of 5

    Al Molter (verified owner) – June 14, 2019

    I ordered online All good!

  4. Rated 4 out of 5

    jeff williams – December 14, 2015

    As per usual you came thru with great quality products and quick shipping.If there is a shortcoming it would be that I generally have to open up bolt slots a little bit with a die grinder, as the flame tapers so does the cut made. If you could open up the holes about .020 all the way around would be great and no grinding would be required. Would also like to see spacers available separately.

  5. Rated 5 out of 5

    jeff williams – January 13, 2015

    Have ordered 3 sets of intake flanges and 1 set of exhaust flanges for Cadillac 500. Excellent quality every time. Needed Holley carb flange,Mailed gasket for pattern,received flange in 2 days and my gasket was returned with it.Flange is now in catalog list.Thanks again for producing a quality part that I can depend on.

Add a review Cancel reply

You must be logged in to post a review.

Shipping & Delivery

Related products

Chrysler Hemi 331-392 Exhaust Flange
Chrysler Hemi 331-392 Exhaust Flange
Compare

Chrysler Hemi 331-392 Exhaust Flange

Rated 5.00 out of 5
$62.00 – $152.00
Includes one pair of exhaust flanges for the Chrysler Hemi 331, 354, 392 hot rod motor (see motor applications below). 
Add to wishlist
Select options
Quick view
Ford 351C, 351M, 400 Exhaust Flange
Ford 351C, 351M, 400 Exhaust Flange
Compare

Ford 351C, 351M, 400 (2V) Exhaust Flange

Rated 5.00 out of 5
$62.00 – $152.00
Includes one pair of exhaust flanges for the  Small Block Ford 351C, 351M, 400 (2V heads) hot rod motor (see
Add to wishlist
Select options
Quick view
Cadillac 331 (Early) Exhaust Flange
Cadillac 331 (Early) Exhaust Flange
Compare

Cadillac 331 (Early) Exhaust Flange

$62.00 – $152.00
Includes one pair of exhaust flanges for the Cadillac 331 (early, small port heads) hot rod motor (see motor applications
Add to wishlist
Select options
Quick view
Chrysler Poly 301-354 Exhaust Flange
Chrysler Poly 301-354 Exhaust Flange
Compare

Chrysler Poly 301-354 Exhaust Flange

Rated 5.00 out of 5
$62.00 – $152.00
Includes one pair of exhaust flanges for the Chrysler Poly 301, 331, 354 hot rod motor (see motor applications below). 
Add to wishlist
Select options
Quick view
Ford Small Block 221-351W Exhaust Flange
Ford Small Block 221-351W Exhaust Flange
Compare

Ford Small Block 221-351W Exhaust Flange

$62.00 – $152.00
Includes one pair of exhaust flanges for the Small Block Ford 221, 260, 289, 302, 351W hot rod motor (see
Add to wishlist
Select options
Quick view
Cadillac 331 (Late) Exhaust Flange
Cadillac 331 (Late) Exhaust Flange
Compare

Cadillac 331 (Late) Exhaust Flange

$62.00 – $152.00
Includes one pair of exhaust flanges for the Cadillac 331 hot rod motor (see motor applications below).  These flanges are
Add to wishlist
Select options
Quick view
Desoto Hemi 276-345 Exhaust Flange
Desoto Hemi 276-345 Exhaust Flange
Compare

Desoto Hemi 276-345 Exhaust Flange

Rated 5.00 out of 5
$62.00 – $152.00
Includes one pair of exhaust flanges for the Desoto Hemi 276, 291, 330, 341, 345 hot rod motor (see motor
Add to wishlist
Select options
Quick view
Rochester 1 Barrel Carburetor Flange
Compare

Rochester 1 Barrel Carburetor Flange

Rated 5.00 out of 5
$9.00
Includes One caburetor base flange for Rochester 1 barrel carburetors.  The flange is cut from 1/4″ thick P&O Steel using
Add to wishlist
Add to cart
Quick view
  • 1012 Viola Lane, Viola ID 83872
  • (208)305-6469
CONTACT US

NEWSLETTER SUBSCRIPTION

FOLLOW US

© 2021 HELLS GATE HOT RODS - PRIVACY POLICY -TERMS & CONDITIONS
  • Menu
  • Categories
  • BOMBER STYLE SEATS
  • CHASSIS/SUSPENSION
    • COMPLETE CHASSIS
    • RIDE CONTROL
    • SUSPENSION KITS
  • DOOR PANELS
  • DRILL GUIDES
  • ENGINE COMPONENTS
    • ACCESSORY DRIVES
    • CARBURETORS
    • MOTOR MOUNTS
    • VALVE COVERS
  • EXHAUST KITS & ACCESSORIES
    • LAKE HEADER KITS
      • HEADER KITS (U-WELD)
        • STRAIGHT LAKE HEADER KITS
        • SWEPT LAKE HEADER KITS
    • LAKE HEADER ACCESSORIES
      • DUMP TUBES & TURNOUTS
      • LAKE HEADER CAPS & BLOCKOFFS
  • MEGAPHONES, TRANSITIONS, COLLECTORS
    • FORMED MERGE COLLECTORS
    • MEGAPHONES
  • FLANGES
    • CARBURETOR FLANGES
      • 1 BARREL
      • 2 BARREL
      • 4 BARREL
    • COLLECTOR/UNIVERSAL FLANGES
      • 3-BOLT COLLECTOR FLANGES
    • EXHAUST/HEADER FLANGES
    • INTAKE FLANGES
    • ONE-PIECE EXHAUST/INTAKE FLANGES
    • TURBO FLANGES
  • INTAKE KITS & ACCESSORIES
    • FULL-WELDED INTAKES
    • INTAKE KITS (U-WELD)
  • MANDREL BENDS
    • COLD-ROLLED STEEL
  • PEDAL ASSEMBLIES
  • PLASMA TRACER
  • Home
  • Products
  • Builds
  • Services
  • About Us
    • Customer Reviews
    • In the Media
  • Blog
  • Contact Us
    • Events
  • Wishlist
  • Login / Register
Shopping cart
close

Sign in

close

Lost your password?

No account yet?

Create an Account