Chevrolet and GM Performance Parts - 454 XTREME 4x4 Crate Engine

Chevrolet - 454 XTREME 4X4

This engine is designed for carburetor equipped vehicles, 4x4 trucks, RV’s, Tow trucks. This is a Chevrolet exclusive engine. Keys - allengine, scperformanceeng, gmperformanceeng, gmgoodwrencheng. Use allengine for a complete list of all three.
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454 PERFORMANCE CRATE ENGINES NAVIGATION

ZZ454/440 MAIN PAGE	ZZ454/440 PICTURES
454 XTREME 4x4 Main Page	454 XTREME 4x4 Dyno Results
454 XTREME 4x4 Photos	HO 454
RAM JET ZL1 454 (No longer Available, information only.)	454ci (7.4L) Partial Engine
We have more GM and Chevrolet Performance Engines available. We have more GM Stock Replacement Long-block Goodwrench Engines available. We have more “Gen 3” and “Gen 4” Design Engines available. (LS1, LS2, LS6, LQ4, LS7)

454 XETREME 4X4 DESCRIPTION

	Chevrolet’s 454 XTREME 4x4 The 454 ci, 454 XTREME 4x4 Engine is a Chevrolet exclusive engine. P/N SC454X This engine is designed for carburetor equipped vehicles, 4x4 trucks, RV’s, Tow trucks. We wanted a engine that would produce huge torque #s at very low RPM levels. We started with a proven package, the Goodwrench 454; this engine has the peanut style, high torque heads. The camshaft was next, so we contacted Comp Cams to discuss our new engine combination we told them what we wanted and they were excited to help, the words flat tappet came up and we said no way we wanted a hydraulic roller cam. So with many questions going back and forth over the phone Comp Cams and Chevrolet Research and Development Personnel decided on a cam grind.
The Chevrolet Engine crew took over installing the roller cam. We decided on the peanut port #8017 Weiand intake manifold (Edelbrock #2161 can be used also). We decided we needed to do some valve train upgrades, so we upgraded the 5/16 push rods to 3/8 heavy duty push rods with the guide plates to match. We also installed ARP rocker studs, then we installed GM long slot stamp steal 1.7 rocker arms. With this combination this valve train will be adjustable. With the engine all assembled we were ready to put it on the dyno for testing. When the first test pulls where finished the race shop manger brought me the figures, I was completely amazed the 454 had over 400 Ft. lbs. of torque below 1500 RPM, so this is how the new 454 combination became alive and available to you. Note: This engine is designed for non computer vehicles. This engine will accept mechanical fuel pump.
	COMP Cams Xtreme 4X4 Cams Newest Design in their Application Specific Camshafts Increases HP In 4-Wheel Drives & Sport Utility Vehicles Increases Usable Torque in 4-Wheel Drives & Sport Utility Vehicles Accelerated Valve Timing Events & Optimized Cylinder Pressure

454 XTREME 4X4 SPECIFICATIONS

Displacement: 7.4 liter (454 cubic inches)	Horsepower: 316 @ 3500 RPM*
Block: Gen 6 cast iron, four bolt main.	Bore/Stroke: 4.250” x 4.00”
Compression: 8:1	Timing: 4° BT DC, 36° @ 3500 RPM
Pistons: Cast Aluminum	Balancer: 8” HD

Connecting Rods: Forged Steel.	Camshaft: Comp Cams Hyd. Roller
Valve Lift (Intake/Exhaust): 511”/511”	Duration (Intake/Exhaust): 206°/212°
Valve Diameter (Intake/Exhaust): 2.07”/1.72”	Valve Springs: Stock 91-95 454 CK Pickups
Cylinder Heads: #125528888 Cast Iron Round Port	Spark Plugs: CR43TS .035 Gap
Max. RPM: 5,000 RPM	Fuel: Unleaded
Crankshaft: Nodular cast iron. One Piece Rear Seal	Push Rods: 3/8 HD, 1010 steel, 3/8 Guide Plates
Torque: 400 lbs. @ 1439 RPM, 423 lbs. @ 1900 RPM, 432 lbs. @ 2100 RPM, 447 lbs. @ 2400 RPM, 462 lbs. @ 3000 RPM, 475 lbs. @ 3500 RPM Dyno Graph and Sheet: Click here for the page showing both of these. Intake Manifold: Aluminum Dual Pattern (8017 Weiand or 2161 Edelbrock) Rocker Arms: HD Long Slot 1.7 Ratio Adjustable Valve Train Distributor: (Optional) GM HEI or MSD, must use a hardened distributor gear. With the roller camshaft, also, a new gear must be used. Also, coat gear with moly lube. Please ask our PARTS SALESMAN for more information. Carburetor: (Optional) We recommend an electric choke style, do to the fact that there is no heat cross over passage in the heads. Carburetor choice's sometimes depends on vehicle application. Edelbrock #1407 Performer series or a #1904 Q-Jet will work. Recalibration may be required on any choice. WARRANTY: 12 months parts only. Warranty must be performed at Chevrolet. No warranty on marine engines. Some restrictions may apply due to abuse or neglect.
*Note: Tested on our Dyno with 2-1/8” headers. Figures will be much lower with cast iron exhaust manifolds.

454 XTREME 4x4 OPTIONS

Options		Price	*Labor
A	Dyno Testing, Break-In Calibration: Your engine will be completely tested and broke in (ready to run). Carb jetting distributor calibration set to a premium performance level. Includes a video of your engine on the dyno, with one test run. You will also receive dyno sheets showing power and torque output.	None	$450.00
B	GM 8mm HD Wires and Looms #12495078 or 12495079 This wire and loom kit will work with Headers or stock cast iron exhaust.	$95.00	$10.00
C	Looms Only #12495502	$12.80	$10.00
D	Fluidampr, longer bearing life less vibrations.	$299.00	None
¹E	1 - 14” Automatic Flexplate (Order as E1) 2 - 12-3/4” Automatic Flexplate (Order as E2) 3 - Bolt kit for either flexplate above. (Order as E3)	$98.50 $98.50 $8.90	$10.00 $10.00 None
¹F	1 - 14” Manual Flywheel (Order as F1) 2 - Bolt kit for 14” Manual Flywheel (Order as F2)	$178.00 $8.90	$10.00 None
G	1 - 1904 Edelbrock 795 CFM Q-Jet Carb. (Order as G1) 2 - Bolt kit for above. (Order as G2) 3 - Electric Choke Pigtail (Order as G3)	$419.95 $5.80 $6.90	None None None
H	1 - Factory Gear Reduction Starter (Order as H1) 2 - Factory Gear Reduction Starter Heat Shield (Order as H2)	$225.00 $10.80	None None
I	Water Pumps 1 - Aluminum Short (Order as I1) 2 - Aluminum Long (Order as I2) 3 - Cast Iron Short (Order as I3) 4 - Cast Iron Long (Order as I4)	$165.00 $165.00 $85.00 $85.00	None None None None
J	Comp Cams Roller Tip Rockers	$130.00	$30.00
K	Crower Full Roller Stainless Rockers Drippers on valve covers must be milled for Roller rocker to fit.	$365.00	$60.00
L	1 - GM HEI Distributor (Order as L1) 2 - GM HEI Distributor Bolt and Clamp (Order as L1) You must install a distributor with a hardened gear.	$195.00 $4.80	None None
M	MSD ready to run style dist. with coil. #8360, #8202	$285.00	None
N	Edelbrock Aluminum Heads #6047 Compression will go to 9:1. Power levels will increase 30 HP and 25 ft.-lbs.	$1250.00	None
O	Thorley Headers (Price is starting price.)	$295.00	None
P	Mechanical Fuel Pump Kit (Price is starting price.)	$45.00	None
Optional upgrades are special order. We can do most anything you request; pulleys and brackets to a turnkey engine. *Note - This is the addition cost if we install the item. ¹Note - You must purchase one of the above to make the engine balance properly. 90 and older engines will not work.