LS Cathedral Port Cylinder Head to Rectangle Port Intake Manifold Adapters

LS1 Cathedral Head Adapter Rectangle Port Intake Manifold LSA Supercharger ZL1 CTS-V
SKU: 551316

Availability: In stock

Proposition 65

WARNING - This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov


ALUMINUM: Most of the aluminum alloys used today contain some level of lead, usually less than .1%. Lead is known to the state of California to cause cancer and reproductive harm. Most aluminum alloys are physiologically inert in their solid form, and the lead is safely contained within, however user-generated dust and/or fumes may pose a hazard if inhaled or ingested. Heating beyond a certain temperature may also provide avenues for exposure.


STEEL (steel bolts):  Steel is an iron alloy with several metals including Nickel and Chromium. Both Nickel and Chromium are known to the State of California to cause cancer and reproductive harm, respectfully. This warning applies to stainless steels as well.

ICT Billet



Cathedral Port Cylinder Head to Rectangle Port Intake Adapter

 Can ONLY be used with Cathedral Port Cylinder Heads
  • Fits: ANY Cathedral Port Heads and will adapte to ANY rectangle port intakes, supercharger or blower.
  • Will not fit raised port LS7 intakes
  • Package Includes: 2 adapter plates (1/2" thick), orings, 70mm bolts with sealing washers for use with an LSA supercharger (please call for other lengths of intake bolts)
  • Made in Wichita, KS from 6061-T6, USA billet aluminum

Intake manifold bolt lengths required when used with
  1. Car intake manifold (M6 x 130mm)  use ICT part # BOLTM6-130X10
  2. Truck intake manifold (M6 x 90mm)  use ICT part # BOLTM6-90X10
See our other listing for reverse adapters


Additional Info

Additional Info

Manufacturer Part Number 551316
UPC 656729843161
Tariff 8409.91.4000
Weight 3.3000
Manufacturer ICT Billet
United States United States
Length Inches 4
Width Inches 17
Height Inches 1
Box Count No
Video No
Size No



Use spaces to separate tags. Use single quotes (') for phrases.

You may also be interested in the following product(s)