SSMBM455MF

Holden VZ V8 Monaro & GTO Dual 3in RHS & LHS Rear Mufflers (Pair)

Holden VZ V8 Monaro & GTO Dual 3in RHS & LHS Rear Mufflers (Pair) (SKU: SSMBM455MF) Engineered for a wide range.

BrandMantaMPI Automotive

Category: Mufflers and resonators

RRP $1651.09 AUD
In stock at supplier
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Holden VZ V8 Monaro & GTO Dual 3in RHS & LHS Rear Mufflers (Pair) product image

Part specs

SKU
SSMBM455MF
Supplier
MPI Automotive
Category
Mufflers and resonators
Stock status
In stock at supplier

The SSMBM455MF is a 3in dual rear muffler pair for the Holden VZ Monaro and Pontiac GTO V8 — a side-specific set, one RHS and one LHS unit, for the coupe's twin rear exit.

Why are these mufflers side-specific?

The VZ Monaro coupe — exported as the Pontiac GTO — ran a twin rear where the left and right mufflers are handed, not interchangeable. This set is supplied as a matched RHS and LHS pair so each side seats correctly on the coupe's hangers and the tips line up evenly at the rear.

What does the dual layout deliver?

Two rear mufflers, one per bank, keep the note balanced across both tailpipes of the V8 coupe. Buying the handed pair together means both sides match for sound and flow, rather than risking an uneven note from a mismatched single.

How does the 3in bore suit the Monaro V8?

Each muffler runs a 3in bore to match the twin 3in rear of the Monaro/GTO V8, keeping the flow consistent to the tail. On a two-door coupe the rear mufflers and their handed tips also sit in view at the bumper, so getting the RHS and LHS units on the correct sides matters for both the note and the finish. Confirm your exact build and rear layout with the workshop, as feed detail is limited on this listing.

What's involved fitting it at our workshop?

Oak Flats Muffler Men supplies and fits the MPI Automotive SSMBM455MF handed pair in-house across the Illawarra. We hoist the coupe, seat the RHS and LHS units on their correct sides, check bumper clearance, and confirm even tip alignment before welding or clamping. Supplied as a matched handed set, it's a clean rear job once the car is up. Send your build and we'll confirm fit.

Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.

Common questions

Are the SSMBM455MF mufflers handed?
Yes — it's a side-specific pair, one RHS and one LHS, supplied together for the Monaro/GTO twin rear so each side seats correctly.
Does it fit the Pontiac GTO?
It's listed for the Holden VZ Monaro and Pontiac GTO V8. Confirm your exact build with the workshop before ordering.

Fitment support across the Illawarra

Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.
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Book the right exhaust job without guessing.

Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.