Box might be the same but not exact measurements within?? K & N website lists PN 33-2116 (1 x 11.375 x 9 in) for Holden, however, the US GTO PN 33-2289 (1.063 x 11.25 x 9 in.) is slightly different in size.gmauto said:OK did some looking up to the one that does Holden here and the filter box is the same on your, KN33-2116
ZappMan said:It's KNN-33-2289 from Summit (just checked my order history). I know this is the one since I just dropped it in last weekend.
Add a 2nd hole in the box - like the Aussies do. Then pick up a HSV intake tube from JHP. Pleanty of power & no hot air issues.Exotic Performance Plus said:We normally keep this filter in stock, but you won't see a performance gain by using it. Install the whole K&N FIPK cold air kit, and you will feel a difference in power, as the stock airbox is too restrictive. Bob
I stand corrected... thanks for the clarification. I thought I read somewhere that the 04s and 05s took the exact same filter.-db- said:You have an '05 and ordered the '04 filter. The '04 filter will work but doesn't fit entirely correctly like the proper '05 version does.
Thony216 posted the correct part no. and info for the '05 version.