Bolt-on performance parts for the Holden VE and VF Commodore V8, including supercharged HSV models: long-tube headers and high-flow cats, the Ramjet 3 OTR cold air intake, and the O2 sensor extension harnesses that go with them. Designed and tested in-house by GM Motorsport in Melbourne.
Two Ramjet header designs, both built from 304 stainless steel and bolting to the factory mounts and any factory-outlet cat-back:
Ramjet REX Triple-Stepped Headers & Cats: primaries step from 1¾″ to 1⅞″ to 2″ for true long-tube, equal-length performance while keeping factory ground clearance. Fits every VE and VF V8, including supercharged HSV variants with factory oil coolers.
Ramjet 1¾″ Headers & Cats: mandrel-bent, equal-length 1¾″ primaries with high-flow cats. The ideal base for camshaft or head-and-cam packages.
Both come in 2.5″ or 3″, with 100-cell metal or 400-cell ceramic high-flow cats.
Ramjet 3 OTR cold air intake
The Ramjet 3 has the largest filter area of any OTR intake on the market and is pressure injection-moulded in OEM-grade plastic, so it doesn't heat-soak like aluminium. It is available for MAF or MAF-less setups and is a direct bolt-on for all VE and VF V8 models. A Ramjet OTR is behind the fastest cam-only VE/VF: 10.67 @ 128mph.
O2 sensor extension harnesses
Long-tube headers move the O2 sensors further down the primaries, so an extension may be needed. VE Series 1 & 2 and VF Series 1 use the square-plug harness (GM-015). VF Series 2 and LSA use the triangle-plug harness (GM-024). Both plug straight in with no cutting or splicing.
Which Ramjet headers should I choose for my VE or VF? +
The REX triple-stepped headers give true long-tube performance while keeping factory ground clearance, and suit everything from mild street to high-boost builds. The 1¾″ headers are a strong base for camshaft and head-and-cam packages. Both bolt to the factory mounts and any factory-outlet cat-back.
Do I need an O2 sensor extension? +
An O2 extension may be needed. VE Series 1 & 2 and VF Series 1 use the square-plug harness (GM-015); VF Series 2 and LSA use the triangle-plug harness (GM-024).
Do I need a tune? +
For the headers, a tune is recommended to realise the full gains but is not required for fitment. For the Ramjet 3 OTR, the MAF version will usually run safely on the factory tune (a custom tune is strongly recommended), while the MAF-less version requires a tune.
Will the headers fit with my cat-back? +
Yes. Any cat-back that starts from the factory outlet bolts straight on, including XForce twin 2.5″ and 3.0″ systems.
How much is shipping? +
$99 flat-rate shipping Australia-wide on exhaust orders and $49 on OTR intake orders, insured and tracked. We also ship worldwide.
