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Knock Sensor Heat Shield
The production system uses a heat shield to protect the driver's side knock sensor. That is due to the close proximity of the
exhaust manifold to the knock sensor. If required for your application, the parts are listed in (Figure 8).
ITEM
DESCRIPTION
1
Shield-knock sensor 12640390
2
Bolt-heat shield
Fig. 8
Evaporative Emissions Valve
The evaporative emissions system can be used with the Chevrolet Performance engine control kit, but is not required for
proper engine operation. This port must be either plugged or connected to a vapor canister. (Figure 9).
Fig. 9
Evaporative Emissions Port
LT4 Engine Installation
TITLE
PART NUMBER QUANTITY
1
11519976
1
IR 12AU15
19332703
PART NO.
9
40
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