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Hooker 8525-3HKR Small Block Chevy Exhaust Manifolds Rectangular Port

(Chevrolet Camaro 1967-74, Impala 1958-74, Malibu 1964-67, 1973-74, Chevelle 1964-73, C10 Pickup 1968-74, Caprice 1966-74 + 39 more models)

Part of: Hooker BlackHeart Cast Iron LS Swap Exhaust Manifolds

Other options in this family: Hooker 8525HKR Hooker 8527HKR Hooker 8525-1HKR Hooker 8527-3HKR

Manufacturer

Picture for manufacturer Hooker

Part Number

8525-3HKR
8 reviews
Sale Price

$425.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Hooker 8525-3HKR exhaust manifolds deliver improved exhaust flow and performance for small block Chevrolet engines equipped with rectangular port cylinder heads. Engineered from high silicon-molybdenum ductile iron, these manifolds provide exceptional high-temperature strength along with superior resistance to oxidation and cracking for long-lasting durability.

Key Features:

  • Designed specifically for rectangular port cylinder heads
  • Accommodates standard straight plug and Vortec straight plug head designs for broad compatibility
  • Larger 1-5/8" cross-sectional area increases exhaust velocity and scavenging
  • 2-1/2" outlet diameter provides enhanced flow capacity over stock manifolds
  • High silicon-molybdenum ductile iron construction for maximum heat resistance
  • Includes weld-on flanges for simplified custom downpipe installation
  • Complete mounting hardware and inlet/outlet gaskets included
  • Available in natural cast iron finish or ceramic coated options (silver, black, and titanium)
  • Maintains factory-style appearance with cleaner, more refined aesthetics

These manifolds offer an excellent balance of performance enhancement and OEM-style fitment, making them ideal for street performance and mild custom applications. The included weld-on flanges allow for flexible exhaust system fabrication while the complete hardware kit ensures straightforward installation.

Products specifications

Fits

Chevrolet Camaro 1967-74, Impala 1958-74, Malibu 1964-67, 1973-74, Chevelle 1964-73, C10 Pickup 1968-74, Caprice 1966-74, El Camino 1959-60, 1964-74, Monte Carlo 1970-74, Chevy II 1962-68, Bel Air 1955-74, Biscayne 1958-72 + 34 more models

Bolt Size

3/8-16 x 3/4

Brand

Hooker

Prop 65

Yes

California Proposition 65 Chemical Name

Nickel (Metallic)

CARB (California) Compliant

No

Category

Exhaust

Collector Diameter

2.50 inch

Emission Code

3

Engine

Chevrolet Small Block Gen I

Exhaust Port Shape

Rectangle

Header Finish

Black Ceramic

Header Style

Manifold

Material

Cast Iron

Part Type

Exhaust Manifold

Product Type

Manifold

Sub Category

Exhaust Manifolds

Warning

California Proposition 65

First time to order from Autoplicity. They beat all others by a lot in price for Minn Kota 10 ft Raptor. Ordered and received promptly. To be honest I had never heard of Autoplicity. Bur after seeing there site. They deal in all kinds of products. They will be my first stop in future for all Auto, Marine products.

better price than Amazon even with shipping

very good

Great customer service, package arrived before ship date, & phenomenal quality

Good

Good

Fast & easy transaction

Quick and easy to locate the part, the connector photo is exactly what I have - on a 21 year old boat!

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