When you're trying to get work done in low-ceiling barns or under overhanging branches, that vertical exhaust stack on your John Deere 3040 or 3140 becomes your worst enemy. This under-bonnet exhaust silencer gives you the clearance you need while keeping noise levels comfortable—no more deafening roar when you're working in tight quarters. What You're Getting Low-profile design fits completely under the hood for maximum clearance Effective noise reduction despite the compact mounting space Built tough to handle the intense heat and limited airflow under the hood Direct bolt-in replacement that works with your existing exhaust connections Opens up work in places your tractor couldn't go before Built for Real Farm Work Your 3040 and 3140 tractors are workhorses that handle everything from loader work to field operations , but standard vertical stacks limit where you can take them. This under-bonnet system lets you work in poultry houses, equipment sheds, orchards, and anywhere else height matters. These mid-size tractors are perfect for tight-space work once you solve the clearance problem. Made to Last Under-hood exhaust components face brutal conditions—extreme heat with limited cooling airflow and constant vibration. This silencer box uses heavy-duty construction and internal baffling designed specifically for these challenging conditions. The materials resist the accelerated corrosion that comes with trapped heat and moisture. Installation Notes This is a direct replacement for tractors originally equipped with under-bonnet exhaust systems. Exhaust temperatures can exceed 800°F, so check clearances carefully from all components including hydraulic lines and wiring . Make sure your cooling system is in top shape since under-hood mounting increases engine compartment temperatures. Most installations take about two hours—take your time getting the clearances right.