CIS Injector Blocks
TurboKraft's CIS Injector Blocks replace the stock plastic CIS fuel injector holders that are known to warp and crack -- especially when ported for more airflow. New phenolic insulator blocks are included to prevent heat soak from the cylinder heads into the injector bodies. Combined, they are a direct fit replacement for the stock plastic units.
TK CIS Injector Blocks are CNC-machined from billet 6061 T-6 aluminum alloy, and available in any bore size from 32mm up to 42mm, including tapered bores (example: 40mm tapered down to 32mm at the heads). The stock plastic blocks cannot be ported beyond 36mm, and even then, they can blow out under boost. TurboKraft's CIS Injector Blocks solve this problem -- permanently.
6x Billet CIS Injector Blocks
6x Phenolic Insulators
12x Intake Manifold Gaskets
6x Copper Crush Washers for Injectors
Standard bore sizes:
32mm = all standard 911 Turbos, from 1975 3.0L Turbo Carrera to 1994 Turbo 3.6
36mm = some factory "Turbo S" models
38mm = popular for high output and/or large displacement Turbo engines
41.5mm = 1984-89 3.2L Carrera, for 930s running Carrera heads with CIS injection
* Tapered bore sizes are no extra charge!
If you require a non-standard size, select "Other" and email us your desired bore size, or leave a comment at checkout.
Allow additional time for non-stock bore sizes and/or Mil-spec anodizing.
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