EGR Block Off Plate

1/8" Aluminum plate to block off the EGR port on the intake manifold.  For off road use only.  M22x1.75 plug for the exhaust manifold is not available at this time.  

LX5 Throttle Body Package

Will ship by Oct 22nd 2022 at the latest. A complete kit to install a 65mm LX5 Throttle Body onto a 3100, 3400, or 3500 60V6 engine.  2 kits are available, one for the 3100/3400 upper intake, and another that is for the 3500 intake.  The 3500 version is considered universal, since it bolts the …

LX5 65mm Throttle Body

Upgrade to a 65mm throttle body for better throttle response and more power.  We clean, blast, and inspect every throttle body we sell.  Can be used on the 3100, 3400, and 3500 upper intake with our WOT-Tech LX5 TB Adapter.  We also offer a package that includes a modified cable bracket for eithe…

LX5 65mm TB Adapter

Will ship by Oct 22nd at the latest. We have designed an adapter to use the 65mm TB found on the Oldsmobile 3.5 DOHC. Bolting it to the manifold (3100, 3400 or 3500, both bolt patterns and sets of bolts are included) is no problem, but attaching the throttle cable bracket will be a DIY project. …

Ported 3500 Upper Intake (2004-2006)

We offer 2 stages of porting for the 3500 upper intake, which depends on the application.  Stage 1 uses the 3400 plenum gasket as a template for use with either a 3400 or 3500 lower intake that is stock, or also Stage 1 ported.  Stage 2 uses the larger 3500 plenum gasket as a template and can only…

Ported 3500 Lower Intake (2004-2006)

We offer 2 stages of porting, each with its own level of modification.  Before we go into detail, it is easier to explain the applications first.  Stage 1 is best for a Stage 1 3400 or 3500 upper.  If you have a 3500 upper, going Stage 2 makes the most sense, even if you use a stock 3500 upper as…

ARP Header Studs

Headers can represent a sizable investment, so you'll want to keep them securely attached. In addition, exhaust leaks can cost you power and even cause damage to your vehicle. ARP has the answer, in the form of their stainless steel header studs. They're made from premium 300 stainless steel, which …

ARP M8 x 1.25 Thread Chaser

A thread chaser will clean out threaded holes without removing material.  We use these on our blocks and heads before assembly to create the ideal clamping force from consistent torque measurements. 

ARP M10 x 1.50 Thread Chaser

A thread chaser will clean out threaded holes without removing material.  We use these on our blocks and heads before assembly to create the ideal clamping force from consistent torque measurements.