[T-Keith]

GM has used plastic intakes for 10 years. Ford and Chysler use in on almost all their models. A lot of Foreign cars use them too. A few have had limited problems, but most if not all were production problems not design.

Engines that use plastic intakes:

GM
96+Vortec V8s
94+ GM 3800 (not series III or supercharged engines)
Northstar
3500 DOHC

Chryslers:
00?+ 3.3, 3.8
2.4
2.7,3.2,3.5
Hemi

Ford:
3.0
3.0 DOHC
4.0 SOHC

And lots more.

-T

 

[T-Keith]

Like I said it's not the parts design that usually at fault. It's simply a bad run. It's really a quality control thing. If the part is made correctly they do work. The fix is to get a new part from a different batch.

-T