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Product Summary

Chevy Small Block V8, Cast Iron, Natural

  • A smoother, cleaner appearance compared to stock exhaust manifolds, while maintaining a OEM style look and feel
  • Made from high silicon-molybdenum ductile iron for high temperature strength plus resistance to oxidation and cracking
  • Designed with a larger 1-5/8" cross-sectional area and 2-1/2" outlets for better air flow and increased performance
  • Available for either rectangular port or raised D-port heads
  • Accommodates standard straight, Vortec straight and angled plug head designs for better application coverage

Key Specs

MFG. Part #8525HKR
BrandHooker Headers

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Details

Hooker's new cast iron small-block Chevy exhaust manifolds offer an increase in performance and visual appearance over stock-style manifolds. Their compact design fit into a wide variety of replacement and engine swap applications. This means you get the traditional look and easy fitment of a stock style exhaust manifold but now with a smoother, cleaner appearance, plus more modern features. These manifolds are cast out of high silicon-molybdenum ductile iron for high temperature strength and better resistance to oxidation and cracking. Internally these manifolds have a larger than stock 1 5/8-inch cross-sectional area and 2 1/2-inch outlets for better air flow and improved performance. Offered for rectangular port heads, these manifolds fit many popular GM applications including standard straight, Vortec straight and angled plug head designs. Gaskets and hardware are included, along with weld-on flanges to aid in downpipe installation.

Features:

  • A smoother, cleaner appearance compared to stock exhaust manifolds, while maintaining a OEM style look and feel
  • Made from high silicon-molybdenum ductile iron for high temperature strength plus resistance to oxidation and cracking
  • Designed with a larger 1 5/8" cross-sectional area and 2 ½" outlets for better air flow and increased performance
  • Available for rectangular port heads
  • Accommodates standard straight, Vortec straight and angled plug head designs for better application coverage
  • Includes weld-on flanges for easier downpipe pipe installation (custom downpipe required)
  • Available in natural cast iron finish
  • Includes mounting hardware and gaskets for inlet and outlet flanges

Charts

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #8525HKR
BrandHooker Headers
GENERAL
Material TypeCast Iron
FinishNatural
Flange StyleSquare Port
Collector Diameter2-1/2 Inch
Gasket(s) IncludedYes
Hardware IncludedYes
Sold in QuantityPair
Emission Code3
GTIN Code090127100684