This is a set of 4 Allstar Performance Full Throttle restrictor plate inserts with a 1.690 in inside diameter (ID), the largest ID offered in the 1/2in-plate insert family. They are made of natural-finish aluminum and are sized for Allstar's 1/2 in thick adjustable restrictor plate. The 1.690 in ID is large enough that it does not meaningfully restrict airflow, so it functions as a non-restricting pass-through insert for classes that do not require restriction, while still using the restrictor plate hardware.
Spec Sheet: Allstar Spec Sheet
Compatibility
Fits Allstar Performance's 1/2in-thick restrictor plate, ALL26180, sold separately. Does not fit the 1in-thick restrictor plate, ALL26060, which uses a separate insert family, ALL26059 and ALL26061 through ALL26069.
FAQ
What is the inside diameter of this insert?
1.690 in, the largest ID in the 1/2in-plate insert family.
Does this insert restrict airflow?
No. It is technically a restrictor plate insert, but the 1.690 in ID is large enough to function as a non-restricting pass-through, used in classes that do not require restriction.
Which restrictor plate does this insert fit?
It fits Allstar's 1/2in-thick restrictor plate, ALL26180. It does not fit the 1in-thick plate, ALL26060.
How many inserts are included?
The set includes 4 inserts.
What material are the inserts made of?
Natural-finish aluminum.
