Ported 3400 V6 Manifold Set

We offer 2 stages of porting, each with its own level of modification.  All of our manifolds are cleaned, baked, blasted, and inspected for cracks and warpage.  Stage 1 uses the stock large port 3100/3400 intake gaskets as a template.  Stage 2 uses the larger 3500 upper intake gasket for the most…

3100/3400 Intake Gasket Set

Metal lower intake gaskets are the latest revision, and we include the throttle body gasket and a torque spec sheet as well.  

3100/3400 Upper Intake Gaskets

Large Port upper gaskets with Throttle Body and EGR gasket

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

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 bracket to the throttle body and not the mani…

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

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.  You will need both gaskets for the 3400…

Ported 3100 Upper Intake (2000+)

We offer 2 stages of porting, each with its own level of modification.  All of our manifolds are cleaned, baked, blasted, and inspected for cracks and warpage.  Stage 1 uses the stock large port 3100/3400 intake gaskets as a template.  Stage 2 uses the larger 3500 intake gasket, or the stock 3400…

Ported 3400 Upper Intake

We offer 2 stages of porting, each with its own level of modification.  All of our manifolds are cleaned, baked, blasted, and inspected for cracks and warpage.  Stage 1 uses the stock large port 3100/3400 intake gaskets as a template.  Stage 2 uses the larger 3500 intake gasket, or the stock 3400…

Ported 3100/3400 Lower Intake

We offer 2 stages of porting, each with its own level of modification.  All of our manifolds are cleaned, baked, blasted, and inspected for cracks and warpage.  Stage 1 uses the stock large port 3100/3400 intake gaskets as a template.  Stage 2 uses the larger 3500 upper intake gasket, or the stoc…

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.