Hello,

I was wondering if anyone would know the part number for exhaust manifolds or would know if a set off a 350 would work with a 305.

The car in question is a `91 Z28, 305 cid.

Thanks,

Ben

Yes

I was wondering if anyone might have the part # for exhaust manifolds for a 305?

I am looking for a set for my '91 Z and I have found a pair that came off a '91 Z 350. The part # off the manifolds shows:
05200 RH 14094084RH
2130N LH 14094069

Thanks in advance.

The following from TransamGTA350, though it doesn't have p/n's, may be helpful. Note the size of the Y pipe):

There were only 2 different manifolds for the V8's throughout the years, but they were different depending on what motor and gearing package they came on. Here is the breakdown.

2" outlet manifolds with single 2 1/4" y-pipe
82-87 305 LG4 (VIN H)
88-92 305 L03 (VIN E)
82-83 305 Crossfire
90-92 305 LB9 w/o G92 axle (VIN F)

2 1/4" outlet manifolds with single 3" y-pipe
83-86 305 L69 (VIN G)
85-89 305 LB9 (VIN F)
88 350 L98 (VIN 8)
89 350 L98 w/o G92 axle (VIN 8)

2 1/4" outlet manifolds with dual 2 1/4" cats
89 350 L98 w/G92 axle (VIN 8)
90-92 350 L98 (VIN 8)
89 305 LB9 w/G92 Axle (VIN F)
90-92 305 LB9 w/G92 (Vin F)

The manifolds from the single 3" cat and the dual 2.25" cats are interchangeable. On the passenger side manifold, some will have the heat riser butterfly valve, some will have a spacer, and some will just have a donut gasket. You most likely have the wrong manifold for your application. If you have the larger manifolds, then it may be worth it to get the larger y-pipe for some more performance.

JamesC

Hey James,

Thanks for the info.

Based on the above, the manifolds for a dual cat set up are the same based on the diameter of the outlet, I am able to use the 350 manifolds on my 305 with no issues?

Thanks again for your help.

Benny