okay, im confused here. im trying to source a N* kit myself so i dont have to pay 300 for a kit.

i searched LQ4 so i can know what vehicle to get it off of.

is this right for the LQ4 MAF?

LQ4 (VIN U) Applications:





And also, there are several series of Northstar engine. i know i asked before. But do all 2000+ have the same throttlebody? surely there are differences, that would make it not bolt up to the adaptor plate or require further modification. See what i mean by tons of different series???



L37

The L37 (VIN "9") was the original North star. It is tuned for responsiveness and power, while the later LD8 is designed for more sedate use. The L37 code had been used on all high-output transverse Northstars, even as the exact engine specifications evolved. Its displacement is 4600cc. The compression ratio for the L37 is 10.3:1 for engines built prior to 2000, and 10:1 for those built afterwards. The original L37 was specified at 290 hp (216 kW), but 1993 production examples were rated at 295 hp (220 kW). The engine topped out at 300 hp (224 kW) from 1996 through 2004 on the STS, DTS and ETC models, making these some of the most powerful domestic front wheel drive cars ever built. For 2005 the high output Northstar became Northstar NHP, and was downrated to 290 horsepower (220 kW) under the new SAE certified horsepower rating system. In 2006, the updated DTS "Performance Package" model got a slight bump to 292 hp (218 kW). Vehicles using the L37 include:
Year Model Power Torque
1993 Cadillac Allanté 295 hp (220 kW) @ 5600 rpm 290 lb·ft (393 N·m) @ 4400 rpm
1993–1994 Cadillac Eldorado ETC 295 hp (220 kW) @ 5600 rpm 290 lb·ft (393 N·m) @ 4400 rpm
1995–2002 Cadillac Eldorado ETC 300 hp (224 kW) @ 6000 rpm 295 lb·ft (400 N·m) @ 4400 rpm
1993 Cadillac Seville STS 295 hp (220 kW) @ 5600 rpm 290 lb·ft (393 N·m) @ 4400 rpm
1994–2004 Cadillac Seville STS 300 hp (224 kW) @ 6000 rpm 295 lb·ft (400 N·m) @ 4400 rpm
1996–2004 Cadillac DeVille Concours/DTS 300 hp (224 kW) @ 6000 rpm 295 lb·ft (400 N·m) @ 4400 rpm
2005 Cadillac DeVille DTS 290 hp (216 kW) @ 5600 rpm 285 lb·ft (386 N·m) @ 4400 rpm
2006–2011 Cadillac DTS Performance 292 hp (218 kW) @ 6300 rpm 288 lb·ft (390 N·m) @ 4500 rpm
2008–2011 Buick Lucerne Super 292 hp (218 kW) @ 6300 rpm 288 lb·ft (390 N·m) @ 4500 rpm
LD8

The LD8 (VIN "Y") is a transverse V8 for front-wheel drive cars. Introduced in 1994, it is designed to provide more torque than the high-revving L37. The LD8 code had been used on all torque-tuned transverse Northstars, even as the exact engine specifications evolved. Compression ratio is 10.3:1 for engines built prior to model year 2000, and 10:1 for those built afterwards.
The 1998 revision is quieter than previous Northstar engines, due to hydraulic engine mounts, and performs better due to a tuned intake system.
Most LD8 Northstars are rated at 275 hp (205 kW) and 300 lb·ft (407 N·m).
Year Model Power Torque
1994 Cadillac Eldorado 270 hp (201 kW) 300 lb·ft (407 N·m)
1995–2001 Cadillac Eldorado 275 hp (205 kW) @ 5750 rpm 300 lb·ft (407 N·m)
2002 Cadillac Eldorado 275 hp (205 kW) @ 5600 rpm 300 lb·ft (407 N·m) @ 4000 rpm
1994 Cadillac Seville SLS 270 hp (201 kW) 300 lb·ft (407 N·m)
1995–2001 Cadillac Seville SLS 275 hp (205 kW) 300 lb·ft (407 N·m)
2002–2004 Cadillac Seville SLS 275 hp (205 kW) 300 lb·ft (407 N·m)
1994 Cadillac DeVille Concours 270 hp (201 kW) 300 lb·ft (407 N·m)
1995 Cadillac DeVille Concours 275 hp (205 kW) @ 5750 rpm 300 lb·ft (407 N·m)
1996–2001 Cadillac DeVille 275 hp (205 kW) @ 5750 rpm 300 lb·ft (407 N·m) @ 4000 rpm
2002–2005 Cadillac DeVille 275 hp (205 kW) @ 5600 rpm 300 lb·ft (407 N·m) @ 4000 rpm
2006–2011 Cadillac DTS 275 hp (205 kW) @ 6000 rpm 295 lb·ft (400 N·m) @ 4400 rpm
2004–2005 Pontiac Bonneville GXP 275 hp (205 kW) @ 5600 rpm 300 lb·ft (407 N·m) @ 4000 rpm
2006–2007 Buick Lucerne CXS 275 hp (205 kW) @ 6000 rpm 295 lb·ft (400 N·m) @ 4400 rpm
LH2

The Northstar was designed originally for transverse front-wheel drive applications. It was modified substantially in 2004 for longitudinal rear- and all-wheel drive use in the STS, SRX, and XLR, as well as receiving continuously variable valve timing on both intake and exhaust sides. The RWD (LH2) Northstar produces 320 hp (239 kW) and 315 lb·ft (427 N·m). An increased compression ratio of 10.5:1 enables most of the increase in power from the L37 and LD8 Northstars.
Year Model Power Torque
2004–2009 Cadillac SRX 320 hp (239 kW) @ 6400 rpm 315 lb·ft (427 N·m) @ 4400 rpm
2004–2009 Cadillac XLR 320 hp (239 kW) @ 6400 rpm 310 lb·ft (420 N·m) @ 4400 rpm
2005–2010 Cadillac STS 320 hp (239 kW) @ 6400 rpm 315 lb·ft (427 N·m) @ 4400 rpm
Supercharged LC3

A 4.4 L (266 cu in) supercharged Northstar was used in the 2006 Cadillac STS-V and Cadillac XLR-V. The bore was reduced for increased strength and improved head gasket sealing. Variable valve timing is used on both the intake and exhaust sides. The STS-V engine produces 469 hp (350 kW) at 6400 rpm and 439 lb·ft (595 N·m) at 3900 rpm with 9:1 compression and the XLR-V engine produces 443 hp (330 kW) at 6400 rpm and 414 lb·ft (561 N·m) at 3900 rpm.
Year Model Power Torque
2006–2009 Cadillac STS-V 469 hp (350 kW) @ 6400 rpm 439 lb·ft (595 N·m) @ 3900 rpm
2006–2009 Cadillac XLR-V 443 hp (330 kW) @ 6400 rpm 414 lb·ft (561 N·m) @ 3900 rpm
L47

The L47 Aurora engine was a special V8 designed for the Oldsmobile Aurora, based on the Northstar engine. It is a DOHC 3,995 cc (3.995 L; 243.8 cu in) V8 which produced 250 horsepower (186 kW) and 260 lb·ft (353 N·m) of torque. The bore was 87 mm (3.4 in) and the stroke was 84 mm (3.3 in). The L47 had a 10.3:1 compression ratio and used premium fuel.

An early version or prototype of this engine was used in the 2nd generation Oldsmobile Aerotech.
Although most of the Northstar's features, including the coolant loss system, remained intact, the decreased bore increased weight unacceptably. To reduce it, Oldsmobile used a one-piece glass-filled thermoplastic intake manifold and simplified AC Rochester sequential fuel injection. A new die-cast structural aluminum oil pan incorporated baffling to reduce oil starvation in hard driving. A starter interlock prevented the starter from engaging if the quiet L47 was already running.
A highly modified 650 hp (485 kW) version of this engine was used by General Motors racing division initially for Indy Racing League competition starting in 1997, then was later used in the Cadillac Northstar LMP program in 2000. Both engines retained the 4.0 L capacity, but the Northstar LMP version was twin-turbocharged.[2]
The Aurora was also used in the Shelby Series 1 car.
The Aurora engine was introduced in 1994 for the 1995 model year, and General Motors has not used this engine since the demise of the marque in 2004.
Year Model Power Torque
1995–2003 Oldsmobile Aurora 250 hp (186 kW) @ 5600 rpm 260 lb·ft (353 N·m) @ 4400 rpm
1999–2005 Shelby Series 1 320 hp (324 PS) @ 6500 rpm 290 lb·ft (390 N·m) @ 5000 rpm
LX5 (Shortstar)

The LX5 V6 is a DOHC engine from Oldsmobile, introduced in 1999 with the Oldsmobile Intrigue. It was produced by the Premium engine group at GM and was thus called the Premium V6, or PV6, while it was being developed. It is based on the L47 Aurora V8, which is itself based on the Northstar engine, so engineers called it the Short North, though Oldsmobile fans have taken to calling it the Shortstar.
It is not a simple cut-down V8. Although it has a 90° vee-angle like the Northstar and Aurora, the engine block was engineered from scratch, so bore centers are different. It has chain-driven dual overhead cams and four valves per cylinder, but is an even-firing design with a split-pin crankshaft similar to the Buick 3800 engine. The LX5 displaced 3,473 cc (3.473 L; 211.9 cu in) and produced 215 hp (160 kW) @ 5,600 rpm and 234 lb·ft (312 N·m) @ 4,400 rpm. Bore is 89.5 mm (3.52 in) and stroke is 92 mm (3.6 in). It was also one of GM's first engines to use coil-on-plug ignition. Compression ratio is 9.3:1.
The cost of building this engine was high, and it was not used in many vehicles. It was said at the time that a family of premium V6s would follow, with displacements ranging from 3.3 L to 3.7 L, but only the LX5 was ever produced before GM axed the Shortstar in favor of their current flagship V6, the High Feature, in 2004.


The LX5 was entirely different from any other V6 in the GM inventory - the only other DOHC V6 engines ever offered by GM include the troublesome-to-maintain Chevrolet Twin Dual Cam produced from 1991-1997 (which was made by heavily modifying the traditional Chevy 60-degree OHV block for the dual overhead cams rather than building a DOHC engine from the ground up), and the Cadillac/Holden HFV6 available from 2004 to the present day. These three designs are completely unrelated and oddly enough leave two gaps in 1998 and 2003 where no DOHC V6 was available from GM. (Except for the 54 degree Opel V6 used most notably in the first generation Cadillac CTS at launch as well as the Saturn L Series.) This contrasts starkly with competitors practices of evolving engineering over multiple, continuously improving designs.

As with the Aurora V8, production stopped with the demise of Oldsmobile.
Year Model Power Torque
1999–2002 Oldsmobile Intrigue 215 hp (160 kW) @ 5600 rpm 234 lb·ft (317 N·m) @ 4400 rpm
2001–2002 Oldsmobile Aurora 215 hp (160 kW) @ 5600 rpm 234 lb·ft (317 N·m) @ 4400 rpm