3.5" 45° Silicone Elbow Color:BLACK 25 classifies the size of

25 classifies the size of the frame

Easy to tune as these are the same injector that came with the ls3 only that they flow more for head and cam cars

pre filter

Can be used with the stock computer

This is a regular 3" long straight coupler for use with high pressure turbo

3.5" 45° Silicone Elbow Color:BLACK 25 classifies the size of45 degree bend to build or finish your intake. Applications: Joining your intake pipe to the throttle body assembly, air metering assembly, intercooler, BOV pipe, or turbo inlet outlet. Custom compressor, intercooler or inlet piping for turbo supercharged car Custom cold air intake for nonturbo car Replacement of all factory rubber parts These silicone parts can be used in trucks, recreational vehicles, boats, or anything else with an engine. Genuine