15/09/2026
We Love Working With Specialists in Their Field
A story of two halves — Pug1Off and GMR
At GMR we're proud of the parts we make, but we've never believed a great result comes from one set of hands alone. The best builds happen when the customer, the hardware and a genuine specialist all pull in the same direction. Dan's Peugeot 306 GTI-6 is exactly that kind of story.
Dan first came to us for a set of GMR throttle bodies — the centrepiece of any serious naturally aspirated Peugeot. Fitted and mapped, the car returned 183.4 bhp. A respectable figure, but the shape of the curve told us the engine had more to give.
To his enormous credit, Dan wanted to chase it rather than settle. Together we set out a plan: change the exhaust, check and correct the camshaft timing, and relocate the injectors into the throttle bodies for cleaner, more consistent fuelling. For a car this specialised, we wanted exactly the right hands on it — so we brought in Pug1Off.
This is where the second half of the story begins. The car already ran a Maniflow exhaust manifold, so, drawing on Pug1Off's deep Peugeot knowledge, a Piper stainless steel exhaust system was chosen to make the most of it. Pug1Off fitted the new system, dialled in the timing on the Cat Cams 4903106 camshafts on the dyno, and tuned the car through every change.
The search for more didn't stop at the exhaust and cams. Pug1Off also turned to the intake, validating the velocity stack lengths on the GMR throttle body kit — trialling both longer and shorter stacks on the dyno. Neither improved on the length the kit ships with, a satisfying confirmation that the intake tuning was already exactly where it needed to be.
The result: 197.3 bhp, with substantial gains right across the curve — not just a taller peak, but more power and torque everywhere from the midrange up to the limiter. Set against the 183.4 bhp we started with, it's a genuinely different car.
We won't pretend we nudged it past the magic 200 — we didn't, quite — but that was never really the point. The gain from where Dan's car began is significant, and out on the road it should feel noticeably stronger, cleaner and more urgent right through the rev range.
These are the projects we love being part of. It took a customer willing to solve the problems put in front of him, and a sterling combined effort from Pug1Off and GMR, to get here. Specialists in their field, working together — that's how a good car becomes a great one.
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Key parts
• GMR throttle bodies
• Cat Cams camshafts — #4903106
• Maniflow exhaust manifold (existing)
• Piper stainless steel exhaust system (fitted)
#4903106
